Slate from Eastern Metals Mine, Quebec, Canada. Comes with certificate of authenticity. Stone type: Slate. Dominant color: multicolored. Origin: Canada. Average weight (Carats): 24.0 carats. Dimensions (mm): 30 x 17 x 6 mm. Ref. SKU008646. Rocks formed by the transformation of existing rocks under pressure, heat, and chemical fluids, such as marble and shale.