This month's birthstone
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Learn about Gemstones
Sapphire
Color:
any color
Hardness:
9
Refractive Index:
1.76 – 1.78
Density:
3.99 – 4.00
Chemical Composition:
Al2O3
Crystal Structure:
Trigonal
Origins:
Burma, Sri Lanka, India, Madagascar, Kenya, Tanzania, Thailand, Cambodia, China, Australia.
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