Chert from Grenville, Quebec, Canada. Comes with certificate of authenticity. Collectible minerals. Type: siliciclastic sedimentary rocks. Stone type: Chert. Dominant color: multicolored. Origin: Canada. Average weight (Carats): 11.7 carats. Dimensions (mm): 21 x 11 x 9 mm. Ref. SKU009382. Sedimentary rock composed mainly of microcrystalline quartz. Used for ornamental objects and jewelry.
