7.65 Ct All-Natural, Untreated Tanzanite Gemstone. Wonderful pear/ near heart shape. This stone has beautiful inclusions and is saturated with color! L: 12 x W: 13mm x D: 7.1mm
I have included a photo of something I made with such a stone.
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Tanzanite Gemstone: Tanzanite is the blue/violet variety of the mineral zoisite belonging to the epidote group. It was discovered by Manuel d'Souza in the Mererani Hills of Manyara Region in Northern Tanzania in 1967, near the city of Arusha and Mount Kilimanjaro. Wikipedia Color: Blue, Purple (& sometimes green) Luster: Vitreous Associated month: December Crystal system: Orthorhombic crystal system Chemical formula: Ca₂Al₃(SiO₄)₃(OH) Hardness (Mohs hardness scale): 6 – 6.5 Mineral class: Zoisite