Kyanite
Chemical composition -- Aluminum silicate.
Color -- Blue, green, pink, white, yellow.
Kyanite used in Jewelry
Source: Austria, Brazil, India, Kenya, Myanmar, Serbia, Switzerland, USA, Zimbabwe ...
Kyanite:
The Blade of Light
Kyanite gives me chills-the good kind. When I hold my special piece, energy, originating at the crown chakra, radiates through me. This is my favorite crystal for shifting my mood into a higher vibration.
Kyanite:
Kyanite's name is derived from the Greek word kyanos, meaning blue, is a polymorph with two other minerals; andalusite and sillimanite.
KYANITE
Overview: The name kyanite is derived from the Greek kyanos meaning "blue."The finest specimens display colors similar to blue sapphire.
Kyanite is usually of contact metamorphic origin, associated with its dimorph, andalusite, garnet, and corundum. Kyanite is also found in eclogites in kimberlite pipes.
Kyanite has perfect cleavage in one direction. This combined with its varying hardness (kyanite is extremely unusual, displaying two hardnesses within one gem), makes kyanite a challenging gem to facet.
Comments:
Kyanite has a hardness of 6-7 across cleavage planes, but only 4-5 along cleavage planes. Colour is typical, yet other colours (gray, white or less commonly light green) do occur.
Inaccurate data? Better photos? .
Enhancements
Kyanite is not known to be enhanced.
More information on gemstone enhancements.
Kyanite ...
Kyanite
aka Blue Talc, Sappare
A shimmery stone with unusual properties, kyanite can become the sparkle in a necklace or the spark plug in an engine.
KYANITE
Gemstone Physical Composition: Kyanite is a polymorph with two other minerals: andalusite and sillimanite. A polymorph is a mineral that shares the same chemistry but a different crystal structure with another, or other, minerals.
KYANITE
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.
Kyanite: This crystal is a cut stone that is pale to deep blue or white, gray, or green.
Labradorite: It is a faceted gemstone which may be orange, yellow, colorless or red. Occurs in metamorphic and igneous rocks in Labrador.
Kyanite. Effective energy conduit. Stillness and trainquility, good for meditation.
Kyanite is a deep sapphire blue, green, gray, or white where the color is not always uniform; it can be blotchy or in streaks.
[Kyanite: H = 5 & 7]
Interestingly, if diamond crystals did not vary in hardness with direction, they couldn't be cut and polished with diamond abrasives.
Kyanite crystals
tetrahedra that are connected only by interstitial cations.
Phenacite group ...
Kyanite"A sky-blue mineral formed by high-pressure metamorphism.
Lepidolite"Lithium mica mineral with a fine lilac color.
Leucite"Feldspathoid mineral also called white garnet.
Kyanite has a similar chemical composition to andalusite and fibrolite, but it has a different crystal structure. Kyanite exhibits a small range of colors including blue, colorless, blue-green, and brown.
See Kyanite, Sillimanite.^M
Varieties: Chiastolite, Viridine
Al2SiO5
Crystallography: orthorhombic
Colors: green, greenish brown w/ reddish tints chiastolite is impure variety showing gray cross on black or gray ground.
Hardness: 7.5 ...
KYANITE Blue Opening psychic ability, connecting with nature, past-life recall, inner bridges
KYANITE Black Aids the clearance of any blocked chakras, both grounding and energising
LABRADORITE Protection, Magic ...
At first I thought that they were merely kyanite, as they appeared to possess the different hardness on two faces of the crystal which is characteristic of that mineral; but Mr.
The minerals associated with corundum are spinel, tourmaline, kyanite, magnetite, chlorite and nephelite. The gem varieties of corundum are obtained very rarely and only in a few places.
A polymorph with two other minerals, Kyanite and Sillimanite, Andalusite is an aluminum silicate. It is pleochroic, which means it displays all its different orange, brown, yellow, green and golden colours in different directions at the same time.
Sillimanite is chemically named Aluminum Silicate and it shows polymorphism with minerals like Kyanite and Andalusite. A mineral which shares similar chemistry with other minerals but differs in their crystalline structure, is called a polymorph.
For example, the mineral kyanite (Al2OSiO4) typically forms elongated crystals. The Mohs hardness parallel to the length of a kyanite crystal is 5, whereas the Mohs hardness perpendicular to the length of such a crystal is 7.
Sillimanite has the same chemical formula as both kyanite and andalusite (these three minerals are polymorphs); Sillimanite is the rarest of the three (all three are used in high-temperature ceramics, used in spark plugs).
For example, the hardness of Kyanite on the Mohs scale is between 6 and 7 lengthwise, and between 4 and 4½ crosswise anthracite A hard, jet-black coal that develops from lignite and bituminous coal through metamorphism, ...
--Deposits in Yancy County produce fine-quality, bright blue facet-grade kyanite. These beautiful stones are some of the finest in the world. Deposits in Alexander County produce some of the finest-quality hiddenite in the world.
Inland and straddling the Highlands region, there are also occurences of garnet, kyanite and diopside and other silicates - though not perhaps always well-crystallized.
...
the name is from a region in Spain (Andalucia), it is one member of three minerals with the same composition, andalusite, sillmanite, and kyanite.
Gem info: ...
Andalusite
Faceted andalusite stones give a play of red, green, and yellow colors that resembles a muted form of iridescence. Andalusite belongs to the same family as kyanite and sillimanite.
kyanite, sillimanite and Andalusite. All three are related to each other with respect to their pressure and temperature formation. These are found rarely and produced in limited quantity even when so many countries produce it.
The most valuable sapphires are well cut, intense but even color blue stones. A blue sapphire can often be confused with stones similar in color suchas benitoite, iolite, kyanite, spinel, tanzanite, tourmaline, ...
Minerals characteristic of low- grade metamorphic environments include the zeolites, chlorites, and andalusite. Minerals character istic of high grade metamorphic environments include sillimanite, kyanite, staurolite, epidote, and amphiboles.
 See also: Crystal, Crystals, Stone, Mineral, Color
  
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