Recently, more and more articles have appeared on the Internet, the readers of which are advised to engage in gold mining from various microelectronic devices, including ordinary SIM cards. The idea is certainly interesting, because gold is always in the price, and in the apartment of every modern user there are probably several already inactive “SIM cards” from different operators. The problem is that the authors of this idea usually avoid very important questions about how much gold is contained in a SIM card and how this precious metal can be extracted from this device.

## How much gold is in a SIM card

However, to begin with, it is worth understanding – what if there is gold in SIM cards? We hasten to reassure you, there really is gold in it, since this precious metal is one of the best conductors of electricity and has excellent resistance to the aggressive effects of alkalis and acids.

You can check it personally. After all, it’s gold that covers the SIM card contacts. This precious metal is also used in the chip itself as a conductor (little bright yellow dots). Recently, however, mining companies have started replacing gold with other metals (silver, nickel, copper, etc.). Therefore, the most valuable, from the perspective of a precious metal hunter, are old-fashioned “SIM cards” with “yellow” rather than silver contacts.

However, back to the amount of gold in the SIM card. In fact, the answer to this question is not too optimistic, because there is too little precious metal in these devices to seriously think about extracting it. After all, no more than one milligram of gold can be mined from a SIM card. Therefore, to extract at least one gram of this noble metal, you will need at least 1000 cards of this type, preferably old type.

## How to get gold from a sim card

Suppose the user nevertheless gets fired up with this idea and collects several thousand SIM cards. Now he is faced with the task of extracting the gold from it, and it will not be easier than finding and extracting this precious metal from the ground.

First, the miner will need to put on rubber gloves and goggles and find a room with an exhaust fan. Then we proceed as follows:

• first pour 500 milliliters of distilled water into a glass container, then add the same amount of nitric acid to it, the specific gravity of which should be 1.35;
• boil the mixture (be sure to work under the hood, a respirator will not interfere) and gradually fall asleep in the capacity of the SIM card;
• after about 15 minutes, add about a liter of hot water to the container and cook the “sims” until the plastic “falls” off the contact pads;
• we manually perform the final separation of plastic and glue from contacts with precious metal (this operation requires a lot of time and patience);
• the cleaned plates are burned;
• the resulting mass is crushed to the state of sand and annealed to remove the remains of “unnecessary coal”;
• we move the burnt gold-bearing rock into a glass and fill it first with distilled water (20 milliliters), then with “royal vodka” (14 milliliters of 30% hydrochloric acid and 6 milliliters of 67% nitric acid);
• we carry out filtration and pour the resulting liquid into a glass in order to bring it to a boil and “precipitate” the gold using special reagents (see the video below);
• boil the precipitate obtained in nitric acid and proceed to the direct remelting of the gold.

The author of this technique has proven in practice that 0.3 grams of gold can be melted on 4,500 “new” SIM cards. In other words, a nano-card contains an average of 0.06 milligrams of this precious metal. Whether it’s worth the “candle game” is up to the readers of this article to decide. By the way, in the “SIM cards” of the old sample there will be much more gold. But where to look for them now is a big question.