About this Product
Koroit Opal Collector Gemstone Cabochon. Koroit Opal comes from a particular area in Queensland, Australia. These firely gemstones are famous for their deep, strong ironstone with stunning patterns and inclusions of color. Polished conglomerate Opal from Koroit makes stunning jewelry with their unique and beautiful natural patterns and kernels. Opal is the October birthstone.
Origin....................Australia
Length...................37mm at longest measure
Width.....................20mm at widest measure
Thickness...............5mm
Weight...................34 carats
Mohs Hardness......5.5 - 6
Back.......................Flat Polished
NOTE: Typical of Boulder Opal, this stone has a few small voids on the face,sides and bottom as shown - please see photo #5.
Stony Mountain Gems
Meet the Maker
Fine Quality Hand Cut Cabochons for Designers and Collectors
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