STAR WILL BE VISIBLE WHEN THE STONE IS UNDER THE LIGHT. Gem Type: NATURAL Star Sapphire 6 RAYS. The item "Natural Black Star Sapphire Oval Cabochon 6 Rays Loose Gemstone(6x4mm 12x10mm)" is in sale since Tuesday, December 1, 2015.This item is in the category "Jewelry & Watches\Loose Diamonds & Gemstones\Loose Gemstones\Sapphire\Natural Sapphires". The seller is "gemsbysun" and is located in Bangkok, Bangkok. This item can be shipped worldwide.