Quartz with Slate inclusions from Col de La Croix de Fer, Saint-Sorlin-d'Arves, Savoie, Auvergne-Rhône-Alpes, France. Comes with certificate of authenticity. Type of stone: Quartz, Slate, Calcite. Dominant color: multicolored. Origin: France. Average weight (Carats): 440.9 carats. Dimensions (mm): 62 x 55 x 39 mm. Ref. : SKU021285. Association of chalcopyrite (copper sulfide) and quartz, often found in hydrothermal veins. Used for mineralogical collections and jewelry.