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"Simply Sapphires-Blue Ceylon Sapphires, Untreated Sapphire, and Fine Colored Gems Australian Solid Boulder Opal 7.65cts 18.9x10.4x4.4mm - Fluorescent Greens and purples dominate this boulder opal from Australia. On some angle it almost appears like a Christmas tree with just green and red, then turning the stone an 1/8th of a turn, and you see purples, greens and blue. A miracle of natural color and style. This a "^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.simplysapphires.com/others/australian-solid-boulder-opal-7.65cts-17.5x9.8mm>