SAPPHIRE

Mohs Scale Hardness

Specific Gravity

Birefringence

Refractive Index

9.0

3.98 - 4.06

0.008

nω=1.768 - 1.772
nε=1.760 - 1.763

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29th Floor, Room #29-01, 919/362 Jewelry Trade Center, Silom Road, Bangkok, Thailand, 10500

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