Where and how is gold used? The nuances of making gold products from your own gold What is made of gold

You will need

  • - buckets;
  • - fine mesh filter;
  • - gravel;
  • - two bottles of electrolyte;
  • - half a bottle of "Whiteness";
  • - tin chloride for testing;
  • - inkstone;
  • - nitric acid for gold purification;
  • - writing paper for the filter;
  • - hose;
  • - syringe;
  • - gas-burner.

Instruction

So, gold from the earth? Dial 6-9 buckets of gravel (about 300 kg). You can take any land. Atomic gold is everywhere. But it is still better to collect gravel not far from some gold-bearing deposit.

Pour water into a bucket. Take a thick cloth and start filtering the gravel through it in small portions. The end result should be a very saturated earth solution. Foam will be noticeable on top of it - dissolved salts that need to be disposed of.

Add about a glass of electrolyte to the solution. The step is optional. However, when using an electrolyte, you can end up with more gold. The fact is that the latter is contained in the soil in the form of very small scales. Due to the adherence of dirt particles to them, they very slowly settle to the bottom (within several days). With an electrolyte, the answer to the question of how to make gold will be easier, since the deposition process will go much faster.

Leave the earth solution with electrolyte to settle for a day. After a day, remove excess liquid from the bucket with a hose. Pour a bottle of electrolyte and half a bottle of Whiteness into it.

If you want to learn how to make gold through an experiment like this and not get hurt, follow the safety precautions. Add electrolyte and whiteness to a bucket somewhere in the garden or even in an open field. The reaction of these two substances gives a very sharp smell, and the vapors released during it are harmful to health. Wear a respirator to avoid poisoning. Close the bucket with a lid.

Once the reaction is complete, filter the gold solution through a very fine filter. You should end up with a perfectly clear orange liquid. It is possible to extract gold from it.

Check if there is gold in the solution. Drop some tin chloride into it. The darkening of the liquid when mixed with drops indicates the presence of gold. Evaporate the resulting orange solution to about 1 liter. Filter it again.

So, we got a pure concentrated solution. So how to make gold out of it? In order to get this precious metal, pour iron sulfate into the solution until it becomes very dark. Wait for the precipitate to fall. Collect excess fluid with a syringe. Filter the precipitate through writing paper. Fuse the resulting gold mass together with the filter using a burner. Throw the resulting piece of gold into nitric acid for cleaning.

Precious metal can be mined at home

Establishing a business and making money in an original way in modern times is not difficult. If you are full of ideas, enthusiastic and determined to work hard, you can start earning on gold. This is not about sales, pawnshops and jewelry stores, but about gold mining at home.

Gold mining is a rather ancient process, and today there are a lot of ways for this. Gold is a valuable metal that the inhabitants of the planet met more than 7,000 years ago.

It is necessary for the manufacture of jewelry, dishes, souvenirs, furniture, clothing, interior items and even building materials. Owning this metal has always been prestigious and fashionable.

The main methods and the beginning of gold mining at home

Surely you are skeptical that gold can be mined on your own. You ask, from what it can be obtained at home? In fact, the methods of extracting gold at home are quite diverse.

You do not need to look for a special place in the yard of your house, explore the territory with special radio devices and gold prospectors, dig up the ground and look for treasure. In order to get this precious metal, it is enough, for example, to have an old gilded watch. It is clear that you cannot have more than a hundred gilded watches lying around at home, a maximum of 1 or 2 copies of old non-working accessories that you inherited from your grandfather or grandmother.

How to increase the amount of "raw materials"? Very simple. We need to start collecting gold-plated watches from the population. Naturally, this must be done consciously, in a civilized and civilized manner, so that it does not look like extortion. It would be advisable to post advertisements where you indicate that you are collecting gilded jewelry for such and such a price, contact by such and such a phone number. In Soviet times, not everyone knew that it was gold that gives the yellow color on the watch. The watch is not completely made of expensive material, but only topped with gold powder to create a gilded look.

According to calculations, we can conclude that two men's gilded watches give 1 gram of 850 gold. You can easily sell this to any jeweler. There is a little less gold in women's watches, but if the number of women's watches is considerable, then the extraction of gold from them will be a large part.

Gold mining process at home

The process of cleaning a gold-bearing part

Mining gold at home, as mentioned earlier, does not require a special search facility, you do not need to look for a place where the treasure can be located. The main thing is the availability of materials from which gold will actually be mined, and the necessary tools that will help to mine gold at home. So, when working, you will need the following equipment:

  • laboratory or jewelry scales;
  • plastic bucket;
  • plastic bowl;
  • electric stove;
  • heat-resistant glass pan;
  • gauze or cloth similar to gauze;
  • sprayer (possible from a plastic bottle);
  • brushes;
  • sharp blade;
  • rubber gloves;
  • water;
  • nitric acid.

Jewelry should be placed in a basin with nitric acid and kept until the moment when the base material is completely dissolved and only gilding remains on the surface. Choose a special convenient place where you will carry out all these procedures and where nothing will interfere with the process. Gold, which is mined with your own hands in front of your eyes, should be filtered with gauze.

After gold mining, expensive material should be thoroughly washed with water and immersed in a solution of alcohol or vodka. Next, hydrazyl hydrochloride must be added to the solution in order to completely precipitate the metal. Leave the gold in the solution overnight in a safe and closed place.

This precipitate is gold

After the gold settles, a brown precipitate forms, which will look like oily clay. It must be washed with distilled water. This will remove all unnecessary reagents. Next, pass the entire sediment through the filter and dry. At this stage, gold mining does not end.

You should place the residue that has formed after filtering into a crucible and heat it with a special gas burner. After that, your gold should turn into a formed ingot. When placed in a crucible, your alloy will still have unwanted impurities, use borax or soda to remove them.

Mixtures of soda and borax are able to prevent gold from unnecessary losses during the smelting process, and also remove excess metal impurities. Place the ingot in a separate place, you can put it in a bowl or saucepan, and pour cold water with a little citric acid. So your ingot will acquire a special shine.

When a decent amount of jewelry has accumulated at home that has fallen into disrepair or has become unfashionable, you can go for the manufacture of gold items from your own gold. This type of service is carried out by small jewelry companies and private craftsmen. In this case, you can save a lot, because you only have to pay for the work, and the lion's share of the cost of finished jewelry is precisely the precious metal.

At the end, you will get a unique thing that can be made even according to your sketch. Making jewelry from your own gold attracts with the opportunity to get an exclusive product, but you need to take this step after careful consideration. There are many pitfalls to explore before heading to the first jeweler you see.

What gold items will make new jewelry

Many private craftsmen or small jewelry companies work exclusively with customer's gold, since it is expensive for them to keep their stocks of metal. But what kind of gold should be carried there in order for the jeweler to accept it completely? The list of products accepted for work can be found on the websites of private companies or inquire directly from the master.

As a rule, the following gold items are accepted for remelting with the subsequent manufacture of a new jewelry:

  • old pendants, rings, rings;
  • torn chains and unpaired earrings;
  • gizmos with lost inserts;
  • dental crowns and dental discs;
  • gold bars;
  • commemorative coins and their scrap;
  • gold plates.

An important note concerns dental crowns. Jewelers prefer to deal with these items not lower than the 750th test. And denture discs made of gold must be imprinted with the trademark of the factory that made them. A similar requirement applies to gold plates - on their surface there must also be a clearly distinguishable imprint with the manufacturer's data.

Otherwise, jewelers do not have strict conditions. They are ready to accept for work products of different samples, but not lower than the 500th, since in lower-quality gold there is more copper than the most precious metal. The color of the scrap handed over for remelting can be any - yellow, white, red or pink.

At the same time, there is a clear list of gold items that will not be accepted for making new jewelry from them in any workshop. The list of prohibited items includes the following:

  • gold in nuggets;
  • plates without names (imprints) of manufacturers;
  • laboratory or industrial items;
  • gold filings and shavings;
  • medals and orders.

When applying for services to a jeweler, be sure to ask him how much jewelry you need to hand over to create a particular product. The fact is that during the manufacture of a new piece of jewelry, you will definitely need a little more gold than it will eventually contain in finished form. The reason for this is the waste of the metal during its remelting. Another small amount of gold becomes fine dust during grinding and polishing of the cast jewelry.

On average, losses are about 10%. Moreover, the percentage increases when the thing that the client chooses for the order is of low weight - the larger the product, the less gold will be lost during its manufacture.

What are you paying for

There is no single cost that can be quoted for making a new item out of your gold.

The price depends on many factors

What is the sum of What else makes it grow?
To begin with, it will be cheaper to make a ring from your own gold than to make a chain from your own gold. The key factor in the price is the complexity of creation. A ring is much easier to make than a chain assembled from hundreds of small elements. And if the product is fancy and takes a long time to make, then the price may rise due to the complexity of the work.
Basically, you pay for the work of a jeweler. But the final price includes not only the direct work of the author. Also, the check will indicate the cost for making a wax model.
Time is taken into account. In the event that a new decoration needs to be made in a short time, then there will still be a surcharge for urgency.
In addition, the final cost will be affected by the weight of the finished item, the presence of precious stones in it. You can also hand them over for inlay or choose from the stones offered by the jeweler, which will also affect the price.

If the gold that you brought is not enough for the manufacture of the selected product, then you will need to pay extra for the missing one. But jewelers are willing to add only a small amount of their own precious metal - no more than one gram - as their stocks are usually small.

A huge plus of turning to private jewelers for a new piece of jewelry is the fact that if you wish, you can agree to pay part of the amount in gold. That is, if the metal you brought is more than enough for the selected product and some quantity remains, then it is possible to calculate its cost and subtract it from the price for the finished product. But you need to understand that this gold is valued as scrap, and therefore its value is not too high.

If you do not want to include the remains of the precious metal in the price, then the excess must be returned to you. They return in the form of a gold plate, on which an imprint with the code of a jewelry company or a private master must be applied.

Work takes time

Different companies offer different lead times for your gold items. The time frame depends not only on the complexity of the order, but also on the number of jewelers. Therefore, some firms promise to cope with the task in two or three weeks, while others immediately admit that it takes them from a month to a month and a half to complete the application qualitatively. Therefore, if you plan to receive a golden new decoration for the holiday, then place an order in advance so as not to overpay for urgency.

However, if we are talking about an engagement ring that you want to make from your own gold, then the terms may not be so long. Masters admit that making an engagement ring is the easiest, as it usually has a laconic design. To make a wedding ring, a jeweler rolls out a bar of gold, bends it and welds it with gold solder. Then he forms it into a right circle and polishes it so that the wedding band shines beautifully. The second manufacturing method allows you to create perfect, seamless rings. In this case, the master makes a wax model of the ring in advance, which adds value to the finished product. It is noteworthy that the jewelers themselves admit that such gold rings have no external differences. But many newlyweds, following the superstition, are happy to shell out twice as much money to ensure that their rings are seamless.

There are several ways to order a product from your own gold. Firstly, the client can choose the design of the accessory from the catalog, which any craftsman or jewelry company must have. In some cases, they even have specimens made from inexpensive metals. Then a person can carefully consider the options in great detail and choose the most suitable for himself. Jewelers can also bring finished gold jewelry to sketch the design and take all the measurements. But even if you only have a photo from a glossy magazine, this option will also work. The master will draw a sketch, create a 3D visualization in a special computer program. After the customer approves the submitted design, the jeweler will begin work.

Customers are always warned that if they want a copy of some model of a famous fashion house, then they will not receive an identical item anyway. Nevertheless, you can count on the fact that your golden new thing will copy the model you like by 85-90%.

Most people won't take a word when they are told that they can mine gold at home. To do this, you do not have to look for a place of gold mining in the yard. In fact, everything is much simpler, you can “mine” gold from gilded things and radio components.

Gold can be obtained from a variety of things that everyone most likely has. One of the most common of these is gold-plated watches. In Soviet times, almost all items used as jewelry that had a yellow color were made using the gilding method.

Now people do not appreciate such things, they most often no longer work, and you can get a little gold from them. Therefore, in order to earn money on this, it is necessary to get a large number of such watches. The easiest method is to buy them from the public by posting ads or posting them on the Internet. From men's watches you can get about 0.5 g of 850 gold, from women's - a little less. You can also “mine” gold from jewelry and other gilded items.

Many radio components produced in the same Soviet times also contained precious metals. In addition to gold, platinum, silver and others can be mined from them. Gold in radio components can be contained both on the surface and inside. Imported radio components also contain a small amount, but, as a rule, there is very little of it. Information on the amount of metals in the details can be obtained in special literature or in the passport for radio equipment. Now it is enough on the Internet.

Gold mining at home

Very often, gold is found on the contacts of connectors and panels for microcircuits. They were covered with such a metal in order to extend the service life of the equipment. It is inert, with its good conductivity properties, unlike copper and silver, it does not oxidize over time. Thanks to the execution of gold, such contacts will remain unchanged for a long time.

Gold is also found in capacitors, microcircuits and diodes, for example, in microcircuits of the 133 and 155 series or ceramic capacitors. You can also extract it from transistors, here are some of them: 2T203, KT602, KT608, KT605, KT603, KT3102 and others. Some may be surprised, but it turns out that a certain amount of this metal is also contained on the contact pads of SIM cards. So future businessmen can try to "extract" it from there as well.

Mining methods

There are two main methods for extracting gold from recycled materials. These are the electrolysis method and the chemical method. The electrolysis method can be used if it is necessary to extract gold from brass or copper. To do this, at a temperature of 15–25 degrees and a current density of 0.1–1 amperes per sq. dm remove gold by anodic dissolution in sulfuric or nitric acid.

The chemical method is universal. For the extraction of gold in this way, "royal vodka" is used. "Royal vodka" is a very strong oxidizing agent, by the action of which chlorine gold is obtained, further processed to obtain a pure metal.

Gold is unique in its properties. It can retain its original beautiful appearance for a long time without being affected by the environment and most household liquids. This is due to its high inertness. Because of this, it is difficult to dissolve, which is why such a strong oxidizing agent is used.

The main components of "royal vodka" are concentrated nitric and hydrochloric acids. When these two components interact, a mixture of products with high activity is formed, including associates and free radicals. Associates - the union of simple molecules into more complex ones without changing the nature of the substance, formed as a result of electrostatic interaction. The association causes the formation of complex compounds, including nitrosyl chloride and atomic chlorine, which are the strongest oxidizing agents.

A mixture such as "aqua regia" must be prepared immediately before use, because its oxidizing potential decreases over time. The interaction of nitrosyl chloride with gold gives chloride gold.

To isolate pure gold, sodium sulfide, sodium pyrosulfide, hydrazine, oxalic acid, hydrogen peroxide or iron sulfate are added to the resulting solution. The result is gold in the form of flakes like foil, which is not so easy to collect. And for this you can not use gauze, as it has large holes. It is best to purchase filter paper. The resulting powder is washed, dried and melted into ingots.

It is necessary to mine gold at home using only high-quality reagents, otherwise the process will be unprofitable: the output of the precious metal will turn out to be much lower than expected. The dishes in which the reactions will take place must be made of aluminum or enameled. In addition, the efficiency of gold mining, as well as the speed, will depend on the preparation of materials. Raw materials should be as free as possible from unnecessary parts and components. By calcining, you can get rid of organic compounds. Iron, which is contained there in large quantities, can be removed with a magnet at the end of the procedure.

Another method

There is another even more original way. At the same time, gold is mined from ordinary water. It can be water from the sea, rivers or even tap water. It is clear that there is very little gold there.

You can mine metal at home or during your vacation. To do this, water must be mixed with milk of lime. After some time, the solution must be lowered into water, and the gold should be removed from the residue.

Advantages and disadvantages of gold mining at home

The above process, which allows you to extract metal from recycled materials, is simple. As not expensive and reagents. Therefore, the process of gold mining is a profitable event. However, one may encounter such a problem as the limited circulation of precursors, since some of the required reagents are included in this list approved by law. Nevertheless, the advantages of such earnings can be distinguished:

  • it does not require a full working day, you can earn extra money in your free time from study and work;
  • the process is highly cost-effective;
  • does not require special skills and tools for work.

The main disadvantage is the restriction on the circulation of precursors. In addition, hazardous substances are used in the reactions, especially strong acids, when working with which you need to be as careful as possible.

What can be done with it?

In addition to selling, such gold can be used for other purposes. For example, to pour something out of it. At home, this is done using special forms. In a container with a spout, metal is melted and poured into a hole made in the mold.

The melting process is carried out in a muffle furnace. It is important to pour the metal in a very thin continuous stream so that the shape does not blur. After cooling, the mold is disassembled and the product is removed.

It will be necessary to subject such a product to further processing, since it has a rough surface. It is polished, for this you can use special pastes or tooth powder and a piece of felt.

Another option for using homemade gold is to repair jewelry by soldering. To do this, it is necessary to prepare an alloy similar to that of which the brazed material consists. For example, if this is a 585 sample, then for the preparation of solder you will need an alloy of 58.5% gold.

The rest of the additions must also match. It can be, for example, copper, silver, nickel, depending on the brand of gold. In order to lower the melting point of the solder, a fourth ingredient, such as cadmium, is added to the solder. For soldering, it is also necessary to use flux, which can be bought at a specialized store.

We connect two parts that need to be soldered together after flux processing, and heat with a burner. After that, we place the solder in the place of soldering and continue to heat until the solder dissolves. After we remove the excess and grind the surface with a needle file.

In addition, you can try spraying gold. You don't even need to complete the process for this. This can be done at the stage of obtaining chloride gold. The precipitate that formed after the reaction is dissolved in a solution of potassium cyanide and elutriated chalk is added until a slurry is formed. The object that they want to make gilded is covered with the resulting mixture and after a while they are washed and polished.

It is also possible to apply a solution of gold chloride in ether to the product, after the evaporation of which the product is also polished. You can also use the galvanic method for gilding.

Mining precious metals at home is a simple task. Possessing reagents and raw materials, you can easily repeat it. Of course, many people are doing this, and therefore it is increasingly difficult to mine gold-bearing materials.

Even the very word "gold" has a magical effect on a person, not to mention his appearance. Dreams of gold-bearing rivers and mines, let them remain dreams. However, for those who still want to feel like a gold miner, we can offer a very real way - gold mining at home. Of course, we are not talking about kilograms, but you can get enough metal to use it for practical purposes.

Properties of gold

Gold is a precious metal that is widely used in jewelry. However, in addition to the jewelry value, it should be noted that its unique electrical conductivity determines its use in electronics, where it is necessary to provide low resistance in the most important details with minimal dimensions. It is these details that become the main raw material for home gold mining.

When organizing the extraction and processing of gold, its main properties should be taken into account:

  1. Large share. This characteristic is used in the implementation of technology such as washing, when a large weight causes gold grains to settle.
  2. High plasticity, which facilitates forging metal in the manufacture of jewelry from it. Gold can be made into very thin threads.
  3. Inertia. Gold does not enter into a chemical reaction with most known acids, alkalis and solvents. Only "royal vodka" and some solvents can affect it. This property is very important for the organization of the mining process.
  4. Lower melting point compared to other metals and minerals, which makes it possible to smelt gold from products and make jewelry from the melt.

Attention. Being in a molten state, gold quickly evaporates, which must be taken into account when melting it.

Where is gold found

A home craftsman needs to tune in to a laborious and painstaking process, because. available raw materials have a meager gold content, and difficult to recover. Precious metal can be mined from the following materials:

  1. Parts of radio equipment and electronic devices - microcircuits, transistors, diodes, capacitors, resistors, switches, motherboards, connectors, processors. The amount of gold sufficient for extraction is contained in relays of the RES, RPS, RPV, RKG type; lamps of old radios and televisions. Radio tubes of the GMI series stand out in particular. Gold-bearing parts can be found in televisions, radios, computers, tape recorders, VCRs, mobile phones, refrigerators, and other household appliances. The presence of such parts, as a rule, was indicated in the passport for the equipment. Modern technologies make it possible to do without the use of precious metals, and therefore they should be looked for in the details of old devices and devices. It should be noted that Soviet-made products were distinguished by a large number of valuable details.
  2. Bijouterie. Gold can be extracted from spoiled, damaged, worn out earrings, rings, pendants, pendants, brooches and other jewelry that has gilding or interspersed with valuable elements.
  3. Watch. Of interest are products with coating on the case or hands, bracelets.
  4. Cutlery and souvenirs . It can be forks, spoons, dishes, figurines, decorating elements with gold plating.

Mining process at home step by step

Gold mining at home can be organized in several ways. They are based on the following principles:

  1. Base Dissolution . Products with surface gilding (watches, dishes) to obtain a precious metal, it is enough to expose it to a powerful solvent. This technique is based on the unique inertness of gold, which is not affected even by concentrated acid. To implement the method, it is enough to place the coated product in a glass container and fill it with concentrated nitric acid. All metal parts will dissolve in 3-4 days, and gold will precipitate.
  2. Etching . This principle is based on the complete dissolution of details. In order to dissolve gold, you need a "hellish mixture" in the form of a combination of hydrochloric and nitric acid - "aqua regia". In such a liquid, gold only dissolves, and all other ingredients do not just dissolve, but chemically react with the acid, forming the corresponding compounds. Under these conditions, the introduction of the required reagents makes it possible to precipitate gold from solution. As they can be used hydroquinone, hydrazine, hydrogen peroxide, sodium sulfite, iron sulfate. Etching technology is most suitable for extracting gold from small parts of electronic devices.
  3. Electrolysis. Gold of high standard can be obtained by electrolysis. The gold-containing radio component serves as the anode, and 2 lead or iron plates are installed as the cathode, connected from above by a conductor. The electrolyte is hydrochloric acid. When passing a direct electric current (with a density of 0.6-0.7 A/sq.dm of the anode area), gold gradually passes to the cathode plates and settles on their surface.

Gold Etching Techniques

When implementing these methods for obtaining gold from various parts, it is necessary to follow a certain procedure. The first production option provides for the following works:

  1. Accumulation of a sufficient amount of raw materials. Remove all items with no value. Only gold-plated elements with a minimum content of other materials are prepared for processing.
  2. Placing raw materials in a glass container and pouring concentrated nitric acid.
  3. After 3-4 days (subject to complete dissolution of the base), the solution is filtered through gauze layers.
  4. The resulting precipitate is placed in a glass container and filled with ethyl alcohol or vodka. Exposure is 22-25 hours.
  5. The brown precipitate is washed and filtered, after which it is sent for melting. To obtain a purer metal, it is recommended to add soda to the melt.

Most often, gold from radio components is mined by etching. This technology is implemented in the following sequence:

  1. Accumulation of sufficient raw materials for processing.
  2. Preparation of "royal vodka". In a glass container, hydrochloric (3 parts) and nitric (1 part) acid are mixed with the utmost care.
  3. Raw materials are cleaned of dirt and loaded into "royal vodka".
  4. The liquid is heated to accelerate dissolution. The process is considered complete when the parts are completely dissolved, and the solution becomes a bright green color.
  5. Deposition of gold. For these purposes, you can use a solution of hydroquinone, prepared by adding 50 g to 1 liter of water. This composition is carefully poured into a vessel with "aqua regia", adhering to a concentration of 10 ml of hydroquinone per 1 liter of solvent. Further, the container is left for 3.5-4 hours.
  6. The solution is carefully filtered, and then the gold deposited on the bottom of the container is evaporated and dried. The precipitate looks like thin pieces of yellow foil.

How to store etched finished metal

Home gold mining is characterized by scanty portions of the precious metal, and therefore it is necessary to minimize its losses. So, at the final stage of gold evaporation, it is recommended to add borax and soda to the resulting sediment, which will reduce waste and simplify further processing. It is better to pour the resulting metal into specially prepared molds (crucibles) at once.

Small burners or muffle furnaces are used to melt gold. The molds are made of cast iron or alloy steel and have a collapsible design. Most often, gold is stored in the form of small bars. Depending on the amount of final product obtained, it is sometimes shaped into rods or wire.

Features of working with reagents

When mining gold at home, you will have to deal with very aggressive and harmful chemicals. It must be remembered that acid fumes (especially when heated) are extremely dangerous for the human body.

In the course of work, nitric oxide is released, which can affect the respiratory system, up to a fatal outcome. Frequent and prolonged inhalation of harmful substances can cause chronic diseases. Concentrated acids can lead to severe chemical burns, both of the skin and mucous membranes.

Important. When working at home, you must strictly observe safety precautions. Good ventilation of the room must be ensured at all stages. You can work only in rubber gloves, goggles, a respirator and a protective apron.

Use of received gold

Gold mined at home can be used in different ways. At the same time, we should not forget that obtaining a permanent income in this way requires obtaining an appropriate license. In general, the following options stand out:

  1. Sale of gold bullion or their delivery for sale. To give the desired appearance, they are polished using toothpaste applied to the rough surface of the metal with felt.
  2. Preparation of jewelry solder for the repair of gold jewelry. Such solder is made by mixing the resulting gold with various additives. For example, to repair products with a 585 sample, the following solder recipe is used: gold - 585 parts by weight (w.h.), copper - 185 w.h., silver - 116 w.h., cadmium - 112 w.h. For ease of use, the solder is prepared in the form of a paste - tinol.

Jewelry making

At home, you can make various simple jewelry - earrings, pendants, rings, rings, chains. The most common method is injection molding. The resulting precious metal is melted in small containers with a spout. Heating to the required temperature is provided by a muffle furnace. Further, the melt is directed in a thin stream through the hole into the mold. If necessary, accurate forging of metal is carried out. The manufacture of complex products requires a set of special jeweler's tools.

Do-it-yourself gold mining at home is a labor-intensive, but quite doable process. The precious metal can be found in old radio equipment and various electronic devices. To extract it, chemical reagents are required, which must be handled with the utmost care. Gold lies idle nearby, and it can be mined without searching for a gold mine.