Beryl (variety emerald), Calcite - Coscuez mining district, Colombia - 85x80x60mm - FOV=4mm
Mineral: Beryl (variety emerald), Calcite
Locality: Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
Dimensions: 85x80x60mm - FOV=4mm

Description: Calcite crystal coated with a dusting of a brownish mineral I could not identify.