Aurichalcite mineral specimen collected from Zacatecas City, Mexico. Aurichalcite is carbonate mineral typically found as a secondary mineral associated with zinc and copper deposits. It is usually found as green / blue crusts of tiny acicular crystals. These specimens are a beautiful light sky blue colour with a silky lustre contrasting against a brown matrix ( possibly limonite ). The minerals stand proudly, mounted (attached with glue) on a polystyrene base within a 1.5" x 1.5" card tray, information label attached. These specimens would be suited for geologists, collectors or simply those interested in mineralogy looking for an attractive display piece.