Gemstones Tools

Sapphire

Blue sapphire cabochon
(saff'-ir)

12th c.; lat. sapphirus; gr. sappheiros; sem. sappîr

Precious stone, a clear variety of corundum that is usually blue but may be any color except red
Color
All colors except red (ruby)
Family
Corundum
Chemical composition
Al2O3
Crystal system
Hexagonal
Hardness (Mohs scale)
9
Specific gravity
4 ±0,05
Refractive index
1,762 - 1,770 +0,008 - 0,004
Birefringence
0,008
Optical character
Uniaxial -
Chanthaburi

Consult list of gems available on the Chanthaburi market...

Jaipur

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