Adamite on Limonite

Ojuela Mine, Mapimi, Durango, Mexico

Beryl var. Aquamarine (etched)

Itatia Mine, Minas Gerais, Brazil

Celestite

Rockwood, Michigan

Corundum var. Sapphire

Potanino Mine, Ilmen Mountains, Russia

Opal var. Hyalite

San Luis Potosi, Mexico

Sphalerite on Quartz

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