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kyanite gem a t - Newest pictures

☹The Gemstone Kyanite☹

Kyanite is more of a collector gem then a mainstream gem, and has not been extensively mined for gem use. Gem quality Kyanite has traditionally come from Brazil, Cambodia, and Burma, but these stones are generally not colored consistently . They usually have a grayish tone, and are not fully transparent, thus limiting their use as a gemstones. However, recent finds in Nepal of high quality Kyanite have been delivering gemstones of exceptional blue color and transparency, rivaling Sapphire.
Chemical FormulaAl2SiO5
Hardness4.5 - 7
Crystal System Triclinic
Refractive Index1.71 - 1.73
SG3.5 - 3.7
TransparencyTransparent to translucent
Double Refraction-0.015
Luster Vitreous
Mineral Class Kyanite

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