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Natural Gemstones: Reference Facts

Orange Sapphire

Sapphire is a member of the mineral corundum, which is one of the best gemstone groups for jewelry setting. Red corundum is known as ruby, and all corundum that is not red is called sapphire. Sapphire comes in a wide range of colors including blue, purple, pink, yellow, orange, green, white or colorless (sapphire colors other than blue are sometimes called fancy sapphires).

Orange sapphire is available from yellowish orange to reddish orange. Orange sapphire has everything a precious stone should have: excellent hardness, magnificent color and exceptional brilliance. With all excellent qualities associated with this gemstone, orange sapphire is suitable for use in any kind of jewelry.

What makes orange sapphire so precious? The warm and fiery color combined with its brilliant fire has made orange sapphire so desirable by gemstone lovers and collectors; however, top-quality orange sapphire with really fine color and good clarity occurs very rarely in the world's mines.

Like all varieties of corundum, orange sapphire symbolizes truth, sincerity and loyalty. Orange sapphire also gives an expression to powerful feeling, passion and love.

Orange Sapphire Known Facts
Color Yellowish Orange, Orange, Reddish Orange
Clarity Type II – usually eye clean with some inclusions under magnification
Crystal Structure Trigonal
Chemical Composition Al2O3 – Aluminum oxide
Luster Vitreous
Optic Character Doubly Refractive
Durability Excellent
Specific Gravity(SG) 4
Refractive Index(RI) 1.762-1.770
Birefringence 0.008
Hardness 9
Occurrence Madagascar, East Africa, Sri Lanka



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