Siderite, Quartz, Calcite from Mésage Mine, Saint-Pierre-de-Mésage, Vizille, Isère, Auvergne-Rhône-Alpes, France. Comes with certificate of authenticity. Type of stone: Siderite, Quartz, Calcite. Dominant color: multicolored. Origin: France. Average weight (Carats): 310.2 carats. Dimensions (mm): 45 x 36 x 33 mm. Ref. : SKU019220. Association of chalcopyrite (copper sulfide) and quartz, often found in hydrothermal veins. Used for mineralogical collections and jewelry.