Department of Rare Industrial Materials

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STAR SAPPHIRE

Ideally, the star in a star sapphire should be perfectly centered when viewed from directly above, with each ray of equal length. The rays should be bright, sharp, and clearly defined–not blurry or fuzzy–and they should reach from the crown of the cabochon to the base without interruption. Star sapphires occur in almost every color seen in transparent sapphires, although yellow, orange, and green star sapphires are very uncommon..