Ame Quartz (faden quartz) + Calcite from Col de La Croix de Fer, Saint-Sorlin-d'Arves, Savoie, Auvergne-Rhône-Alpes, France. Comes with certificate of authenticity. Average weight (Carats): 222.9 carats. Dimensions (mm): 73 x 28 x 22 mm. Ref. : SKU021238. Silicon dioxide (SiO2) mineral formed under various geological conditions. Widely used in jewelry for its diversity of colors and its hardness.
