Chalcocite and other sulfides from a 2013 discovery at the Tongshan Copper-Iron Mine, Daye, Huangshi County, Hubei Province China

摘要

A few strange specimens of a colorful metallic mineral were first brought to the Arkenstone's buying office in Shanghai around the end of 2012. They were labeled as “copper” at the time. By January, emails had been received with pictures of a bewildering variety of habits, all clearly of the same material.