When Star Sapphire crystals are growing clusters of parallel fibrous inclusions form along the hexagonal crystal lines, and when the stones are cut en cabochon, these lines are centered in the gems. Then when the light hits these inclusions, a line forms perpendicular to the fibers, resulting in a 6-ray star shimmering over the surface of the gem. This is a particularly fine example, since the gem is a translucent blue color, the star is centered and moves freely, and the star is intense in all lighting. This is set in the classic Princess Diana style halo mounting to add some sparkle and presence on the hand. 

Details: 14k white gold ring with 10ct Ceylon Star Sapphire and 1.00ct diamond accents (VS GH), circa 1980. 

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