Gemstones Tools

Carnelian

Carnelian cabochon
(kar-nel'-yan')

17th c.; fre. corneline, lat. cornus

Tough translucent chalcedony, orange to red color, used in jewelry
Color
Semitransparent to translucent red, orange to brown
Family
Chalcedony - Cryptocristalline quartz
Chemical composition
SiO2
Crystal system
Hexagonal
Hardness (Mohs scale)
6,5 - 7
Specific gravity
2,60 ±0,05
Refractive index
1,537 ±0,02
Birefringence
Invisible
Optical character
None (aggregate)
Chanthaburi

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Jaipur

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