Apothecaries' system between actual and nominal weight. In the 19th century, most European countries or cities still had at least a "commercial" or "civil" system (such as the English avoirdupois system) for general trading, and a second system (such as the troy system) for precious metals such as gold and silver. The system for precious metals was usually divided in a different way from the commercial system, often using special units such as the carat. More significantly, it was often based on different weight standards. The apothecaries' system often used the same ounces as the precious metals system, although even then the
Silvercorp Metals Silvercorp Metals Silvercorp Metals Inc. (Silvercorp) is a Canadian-based, China focused precious metals company engaged in the acquisition, exploration, and development of silver containing properties. It is China's largest primary silver producer. The company is publicly traded on the Toronto Stock Exchange in Canada and the NYSE in the U.S. Silvercorp Metals operates four silver/lead/zinc mines in an area encompassing the SGX, HPG, TLP and LM mines (the Ying Mining District), owned through its 77.5% and 80% Chinese subsidiary companies, respectively. Silvercorp Metals' other material property, the Gaocheng project in Guangdong Province, owned through a 95% Chinese subsidiary company, began