The solar ruble of Peter I

This rare and very expensive coin numismatists call it the "solar ruble". The coin depicts the first Russian emperor Peter the Great, he won the war with Sweden and carried out many reforms in Russia. And most importantly, on his orders in Russia, for the first time, they began minting a full Russian coin following the example of the German and English coins of that time. The coins of Peter were later melted down on the orders of his descendants, so there were very few of them left. Basically, now such coins are found only in the treasures, recently treasure hunt is very developed in Russia. And such a coin is a true dream of a treasure hunter, but they are found only by ones this coin was found by a treasure hunter with the help of a metal detector.