Lab Sapphire Alexandrite Color Change Round Brilliant Loose Unset Gem (6mm) click for more sizes by Optima Gem at Metro Atlantic. MPN: 697xx-01. Hurry! Limited time offer. Offer valid only while supplies last. These gems are created Corundum meant to imitate the color change effect of an Alexandrite. There is some variation in the colors on both sides of the color change and lighting will drastically affect the look. These gems are created by the Flame Fusion process and have essentially the same physical properties as natural Sapphire.All genuine Optima Gem products come with our certificate of quality and authenticity upon request.. Fine Cut = Precision cut or visually imitates a precision cut.
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