Weight: 8.5, 7.0, 4.0 carats Dimensions: 16.8x15.2x4.5 mm, 15.3x12.6x4.6 mm, 15.5x11.8x3.1 mm Description: Turquoise vein nuggets found at Stone Mountain Mine fashioned into a trio of green turquoise cabochons. All the turquoise we sell is natural, untreated and un-backed.