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 Coober Pedy White Opal 2.30 cts $150.00 Add to cart Premium Calibrated Triplet Opal Parcel $110.00 Add to cart Lightning Ridge Black Crystal Opal Parcel 3.50 cts $200.00 Add to cart