Cuprite on native Copper, Russia

Cluster of brilliant emerald-green Dioptase crystals on matrix. The largest dioptase crystal is 0.4 inches. Crystals are rhombohedral shape. The specimen is from the type location for dioptase: Altyn-Tyube deposit, Karaganda Region, Kazakhstan.

Cluster of brilliant emerald-green Dioptase crystals on matrix. The largest dioptase crystal is 0.5 inches. Crystals are rhombohedral shape. The specimen is from the type location for dioptase: Altyn-Tyube deposit, Karaganda Region, Kazakhstan.

Sphalerite, Huanggang Mine, Chifeng, Inner Mongolia, China

Petroleum-included Quartz