Premium Calibrated Opal Round Doublets 4mm (priced individually)$22.50 In stock Premium Calibrated Opal Round Doublets 4mm (priced individually) quantity Add to cart Description Description These opal doublets measure 4 x 4 x 1.5 mm and have prominent green/blue colouring. Related products Beginner Jeweller Parcel 3 cts $120.00 Add to cart Sale! Lightning Ridge Semi Black Opal 1.40 cts $100.00 $65.00 Add to cart Large Koroit Boulder Opal Specimen 108.65 cts $300.00 Add to cart