Gemstones Tools

Topaz

Cushion cut topaz
(tô-paz')

13th c.; lat. topazus; gr. topazos

Colorless, blue, yellow, brown, or pink aluminum silicate mineral, often found in association with granitic rocks and valued as a gemstone, especially in the brown and pink varieties
Color
All colors
Family
Aluminum fluosilicate
Chemical composition
Al2(F,OH)2SiO4
Crystal system
Orthorhombic
Hardness (Mohs scale)
8
Specific gravity
3,53 ±0,04
Refractive index
1,619 - 1,627 ±0,01
Birefringence
0,008
Optical character
Biaxial +
Chanthaburi

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Jaipur

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