Sapphire – 318 carat green Crystal from the Ihosy District


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This sapphire crystal is from the Zazafotsy Quarry, Zazafotsy Commune, Ihosy District, Horombe Region, Fianarantsoa Province, Madagascar. Seven different mineral species have been identified from this locale including five gemstone varieties. Sapphire is in the corundum family of minerals and it is an oxide mineral (Al,O). This crystal has a hexagonal morphology and is double terminated. It is intact and has complete surfaces on all sides. One termination has well defined triangular growth patterns and there are some minor magnetite crystals present. This is an excellent specimen with an olive green color and  a vitreous luster It measures.1 1/4 x 1 1/8 x 1 inches or 32 x 28 x 25 mm. It weighs 318 carats.

Additional information

Weight7 oz