“Jack” is the nickname or slang term miners used to refer to Sphalerite. Black Sphalerite was called Black Jack and the translucent ruby-red from of Sphalerite was aptly called Ruby Jack. Thus, we have a very aesthetic piece consisting of dark-gray Chalcedony hosting numerous Ruby Jack Sphalerite crystals and even more numerous intersecting lightly golden-colored lenticular Calcite crystals . . .

Location: Shuikoushan Mine, Hunan Province, China

Size: 10 x 6 x 10.5 cm