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Semi Precious Stones » Kyanite Stone

Kyanite Stones










Kyanite Stone


Chemical Structure: Al2SiO5
Mineral: Aluminum Silicate
Hardness: 6.5 to 7.0
Refractive Index: 1.71 to 1.75.
Specific Gravity: 6.56 to 6.67
Luster: Vitreous; Pearly
Solubility: None

The Latin name of Kyanite stone is Kyanos, which means blue. These are typical silicate minerals having blue color. These minerals are usually found in aluminum rich metamorphic pegmatites and/or sedimentary rocks. these mineral stones belonging to the alumino-silicate series. As these mineral stones are powerfully Anisotropic therefore, their hardness depends upon their crystallographic direction.


These stones are found either in transparent form or in translucent form. The major colors in which they are available are white, green, gray and black. Their crystal system is Triclinic. These stones are brittle in their nature. The other few associated minerals which are found along with Kyanite are Sillimanite, Micas, Garnets, Staurolite, Andalusite etc. the notable occurrence places of these mineral stones are North Carolina and Georgia (both in U.S.A), Brazil, Russia, India, Switzerland and Kenya.



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