Gemstones Tools

Zircon

Oval and octagon cut orange zircons
(zîr'-konn')

18th c.; pers. zargun

Natural gemstone of variable color, mineral made of zirconium silicate
Color
Colorless, yellow, brown, red, orange, blue, green, violet
Family
Zirconium silicate
Chemical composition
ZrSiO4
Crystal system
Tetragonal
Hardness (Mohs scale)
6 - 7,5
Specific gravity
4,30 ±0,40
Refractive index
1,78 to 2,01
Birefringence
0,01 to 0,06
Optical character
Uniaxial +
Chanthaburi

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Jaipur

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