Tanzanite Faceted Sterling Silver Pronged Ring | Tanzania METEORJEWELRY Bismuth is a brittle

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Tanzanite Faceted Sterling Silver Pronged Ring | Tanzania METEORJEWELRY Bismuth is a brittleThis is a beautiful Faceted Tanzanite specimen from Tanzania set into a . 925 sterling silver pronged ring mount. Available in a triangle, oval, and round cut (depending on availability). Faceted Tanzanite Ring Tanzania . 925 Sterling Silver Setting Measures Approx. 4mm x 5mm and 7ct. Tanzanite is a rare blue violet variety of the mineral zoisite (CaAl(SiO)(OH)), colored by trace amounts of vanadium. With a Mohs hardness of 6 7, it is softer than