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Koroit Opal Nut in ironstone band

Conichalcite / Mineral Friends ♥

Tanzanite with Prehnite from Merelani Hills, Lelatema Mtns., Arusha Region, Tanzania [db_pics/pics/af470a.jpg]

Green Fluorite with Amethyst on Calcite from China

Fluorite and Calcite : Minerva Mine #1 Hardin County, Illinois,1993, Ex George Feist Collection. Pictured in the Mineralogical Record.

Elongated scalenohedral transparent red Rhodochrosite crystal...