Cornflower Blue Sapphire
The Island of Sri Lanka (Ceylon) is famous for its pleasing shade of blue sapphire. The color is not too dark and not too light, and it has a dim luminescence that shows its color even under low light conditions.Blue sapphires typically have some inclusions. Blue sapphires with extremely high clarity are rare and very valuable. . The best Ceylon cornflower blue sapphire stones are from Sri Lanka, and purchasing from Crescent Gems give you the best value for your stones as they come directly from the source.
The traditional heating of sapphires is a widely used and accepted enhancement process which can improve the transparency and color of the stones. Techniques range from simply throwing gems into a fire to be cooked to employing sophisticated electric or gas furnaces at specific pressures and atmospheric conditions. The treatment is permanent and heated stones do not require any special care. Untreated stones are highly prized and are normally twice the price of heated stones.Crescent Gems deals only with untreated or heat-treated gemstones. We do not sell/stock/deal with beryllium-treated gemstones.
Afghanistan, Australia, Myanmar/Burma, Cambodia, China, Colombia, India (Kashmir), Kenya, Laos, Madagascar, Malawi, Nepal, Nigeria, Pakistan, Sri lanka, Tajikistan, Tanzania, Thailand, United States (Montana) and Vietnam
Birthstone : month of September Mineral Class? : Corundum Chemical composition : Aluminum oxide Al2O3 + Fe, Ti, Cr, and other trace elements Crystal class ?: ?Hexagonal scalenohedral Mohs scale : 9 Specific gravity : 3.99 – 4.10; usually near 4.0 Refractive Index? : ?1.759-1.778 Birefringence of : 0.008 Crystal system : Trigonal Luster?: ?Vitreous to adamantine Cleavage?: ?None, but may exhibit parting
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