23.60 carats ( Zachary treatment ) Sonoran Blue Turquoise Cabochon. This cabochon is backed. The cabochon measures : 28 mm long X 19 mm wide.
23.60 carats ( Zachary treatment ) Sonoran Blue Turquoise Cabochon. This cabochon is backed. The cabochon measures : 28 mm long X 19 mm wide.