DIAMOND CALCITE, CHINA Important specimen of Calcite known as "diamond". This mineral is mainly composed of calcium carbonate. This specimen has the particularity of revealing a spectrum of colours from pink to orange when exposed to ultraviolet (UV) light. A beautiful curiosity cabinet piece Specimen collected in China A DIAMOND CALCITE, CHINA 35 CM - 13,8 IN. This mineral specimen is not subject to regulation under the Washington Convention (CITES), European Community Regulation 338/97 of 09/12/1996, and the French Environment Code.