Quartz window from Allos area (Col d'Allos), Alpes-de-Haute-Provence, Provence-Alpes-Côte d'Azur, France. Comes with certificate of authenticity. Average weight (Carats): 3265.1 carats. Dimensions (mm): 125 x 78 x 66 mm. Ref. : SKU021215. Silicon dioxide (SiO2) mineral formed under various geological conditions. Widely used in jewelry for its diversity of colors and its hardness.
