Danburite: Rough and Cut

Charcas, San Luis Potosi, Mexico

Quartz, var. Herkimer Diamond

Ace of Diamonds Mine, Herkimer County, New York

Sphalerite on Quartz

Shuikoushan Lead/Zinc Mine, Chaling, Hunan Province, China

Spinel (rough and cut)

Mogok, Sagaing District, Mandalay Division, Burma (Myanmar)

Stilbite

Jalgaon, India

Tourmaline var. Uvite with Magnesite and Quartz

Brumado, Bahia, Northeast Region, Brazil