Benitoite from California State Gem Mine (Benitoite Gem Mine), Santa Rita Peak, New Idria District, Diablo Range, San Benito Co., California, USA. Comes with certificate of authenticity Stone type: Benitoite Dominant color: Blue Origin: USA Average Weight (Carats): 0.215 ct Dimensions (mm): 4 x 3 x 2 mm Ref. : SKU029991