Cu-bearing Aragonite

Description

Attractive botryoidal aragonite with an intense sky-blue colour caused by small amounts of copper. Cu²⁺ is incorporated into the aragonite, partly replacing Ca²⁺ in its crystal structure and producing the characteristic blue to turquoise colour. Specimens of this type are characteristic of the Wenshan mining district in Yunnan, China.

Locality

Wenshan mine, Yunnan, China

Size