polymorph whose other two minerals are sillimanite and andalusite. Usually blue.
Glossy or pearly aluminum-based stone. La Llorona Mexican: A modern aspect of the Aztec goddess Cihuacoatl, who is in turn an aspect of the Aztec goddess Coatlicue.
Kyanite has a similar chemical composition to andalusite and fibrolite but it has a different crystal structure. It exhibits a range of colors including blue to colorless, blue-green and brown. On Mohs’ scale of hardness, kyanite is 4 – 4.5. It has a vitreous luster and primary sources includes Burma (Myanmar), Brazil, Kenya, Austria, Switzerland, Zimbabwe and the United States. (See Kyanite Facts.) (Note: Sources listed in order of primary and secondary deposits.)
a gray or greenish-blue mineral consisting of aluminum silicate in crystalline form; occurs in metaphoric rock, used as a refractory
An aluminum-rich, blue to light green silicate mineral. Kyanite forms in metamorphic rocks at moderate temperature and high pressure. lahar A type of mudflow that originates on the slopes of volcanoes when volcanic ash and debris becomes saturated with water and flows rapidly downslope.
Kyanite is a deep sapphire blue, green, gray, or white gemstone. The color is not always uniform; it can be blotchy or in streaks. The cystals are crystals are transparent to translucent. Kyanite has a hardness of 4.5 to 6.5; the hardness varies depending on which way it is scratched (this happens because kyanite consists of long, thin crystals). It has a specific gravity of 3.58. Kyanite is found in Brazil, Burma, Kenya, Europe, India, Australia, Kenya, and the USA. Kyanite's chemical composition is Al SiO; it is composed of andalusite and sillimanite. All About Jewels: Illustrated Dictionary of Jewelry Click on an underlined word for more information on that subject. If the jewelry term you are looking for is not in the dictionary, please e-mail me and I'll add it. Enchanted Learning® Over 20,000 Web Pages. Sample Pages for Prospective Subscribers
This crystal is a cut stone that is pale to deep blue or white, gray, or green.
Kyanite, whose name derives from the Greek word kyanos, meaning blue, is a typically blue silicate mineral, commonly found in aluminium-rich metamorphic pegmatites and/or sedimentary rock. Kyanite is a diagnostic mineral of the Blueschist Facies of metamorphic rocks.
