Measures : 62 x 42 x 27 mm approximately (6.35mm = 1/4 inch). The item "Stunning Natural Australian Queensland Boulder Opal Specimen 558.5ct (1657)" is in sale since Monday, April 15, 2019. This item is in the category "Jewelry & Watches\Loose Diamonds & Gemstones\Loose Gemstones\Opal\Boulder Opals". The seller is "opalwholesalers" and is located in Kensington Gardens, SA. This item can be shipped worldwide.