This month's birthstone
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Learn about Gemstones
Ruby
Color:
red, purple red
Hardness:
9
Refractive Index:
1.76 – 1.78
Density:
3.99 – 4.06
Chemical Composition:
Al2O3
Crystal Structure:
hexagonal
Origins:
Burma, Sri Lanka, Thailand, Cambodia, Vietnam, Madagascar, Tanzania, Kenya.
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