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Sapphire

Sapphire is the name given to any precious gem of corundum that is not red, though it is classically a deep blue, adamantine stone. It is found in East Africa, Madagascar, and Sri Lanka, but the deepest blues come from Kashmir. Titanium and iron are responsible for the blue hues, and chromium for the pinks and oranges.

Chemical Formula

Al2O3

BirthStone Month

September

Gemstone Mineral

Corundum

Hardness

9.00

Specific Gravity

3.960 - 4.050

Double Refraction

1.757

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