Description Opal Gemstones all natural Australian opals guaranteed 100%. To Daniel Pogson your order of 7 Australian black opal gemstones is ready , with 1 – $500 parcel of mixed Australian opals , please go to the check out, PayPal banking transfer of funds available. Graham Black is a registered guarantee natural Australian opal wholesaler & jeweller at paypal transfer 0f $3500 Australian dollars to = US $2683. Opal 1/. Lab testing certificate for opal gemstones. Opal 2/. Professional lab testing certificate for opal gemstones by University professional gemologist. Opal 3/. Australian opal gemstone. Opal. Black opal. Opal 4/. Opal gemstone. Professional lab testing certificate for opal gemstones by University professional gemologists. Australian opal. Opal 5/. Wholesale opal. Wholesale opals. Professional lab testing certificate for opal gemstones by University professional gemologists. Wholesale Australian opal. Opal 6/. Wholesale black opal. Gemstone lab testing professional certificate stating natural Black opal. Wholesale Australian black opal. Opal 7/. Australian opal. This opal does not come with a certificate but I personally guarantee this is a natural solid Australian multicoloured black opal, with no treatment of any kind.