Corundum var. Ruby in Zoisite Locality: Longido, Arusha, Tanzania Description: Superb hexagonal ruby crystal, the red-pink gem variety of the mineral species corundum, in green zoisite matrix. The ruby crystal has exceptionally rich color and runs completely through the matrix. From the Online Mineral Museum
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1930's Art Deco ruby and diamond double cluster ring, set with a central ruby of approximately 1 carat. The central ruby is encircled by an old-cut diamond cluster surround, all within a border of calibre-cut rubies set in platinum.