Group of Quartz crystals including a flat crystal from the Grandes Rousses Massif (Isère boundary), Savoie, France. Comes with certificate of authenticity. Minerals from the collection of Jean-Christian Goujou (Treasure-generating). Type of stone : Quartz. Dominant color : White. Origin : France. Average weight (Carats) : 97.3 cts. Dimension (mm) : 45 x 40 x 25 mm. Ref. SKU007593. Silicon dioxide mineral (SiO2) formed under various geological conditions. Widely used in jewelry for its diversity of colors and its hardness. The Seller confirms that its products comply with all applicable laws and are only offered if they comply with Joom's policies and European laws on product safety and conformity.