Opal Rings Genuine Australian "Gem Grade" Opal Triplets - Sizes 6 to 11 US
Natural Genuine Earth Mined Australian Opal Triplet - "Gem Grade". 8 x 6 mm Opal Triplet Bright Greens, Blues, & Golds. "Gem" Grade is the Highest Grade Opal. Ring Sizes. 11 US = V-W UK. 10 US = T-U UK.