21mm

Semi Black Opal Blue Green 21x18x5 Cabochon Oval 11.7 Carat

Semi Black Opal Multicolour 21x17x5.5 Cabochon Oval 11.90 Carat

Crystal Opal Blue Green 31x17x3.5 Cabochon Oval 8.25 Carat

White Opal Red Multicolour 21x8.8x5 Cabochon Pear 5.85 Carat

White Opal Red Multicolour 21x14x7 Cabochon Fossil Freeform 7.60 Carat

White Opal Multicolour 21x10x5.5 Cabochon Freeform 6.65 Carat

White Opal Green Multicolour 21x20x7 Cabochon Triangle 17.76 Carat