Grodno found an unusual coin and counts on tips coin collectors
Near the fenced construction site in the very center of Grodno Grodno resident Anatoly Pozharov found a coin, the history of which probably sends us a few centuries ago. On…

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Numismatics - Peter's true passion
In recent years, interest in numismatics has increased among the Russian population, which is both exciting and quite profitable. Following this trend, many shops selling antiques open stores for coin…

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Possessions of the Habsburgs - Austria (XII-XX centuries)
In 1273, King Rudolph I became the first representative of the Habsburg clan who ascended to the Roman-German throne. It began the reign of the Habsburg dynasty, which lasted until…

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How to invest money in coins
The stock market is falling, the ruble is getting cheaper, interest on deposits hardly falls short of inflation. And we all begin to think about other ways to save and…

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copper carbonate

Cleaning of old coins

The purpose of this message is to acquaint interested readers with the most simple and safe methods of cleaning coins, which the author can recommend based on his many years of experience in the restoration of an archaeological metal at the State Hermitage Museum. Clearing coins is one of the crucial types of restoration, it is important for their study, dating, identification and storage. Ancient coins made of silver and copper alloys, found in treasures or in other archaeological excavations, most often enter the restoration workshop highly corroded, and sometimes completely mineralized. Under the action of water and salts, copper is destroyed in the soil to form green carbonates and chlorides, red cuprous oxide and black oxide. Continue reading

Cleaning of old coins
The purpose of this message is to acquaint interested readers with the most simple and safe methods of cleaning coins, which the author can recommend based on his many years…

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European coins and medals (XVI-XXI century)
New time in numismatics begins in Europe around 1500 in the lands of the Habsburgs. In 1486, by order of the Archduke Sigismund (1439-1490), the Tyrolean guldengros was minted. It…

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