Sillimanite Cabochons Gemstone
It is even believed increasing energy and a general feeling of well being. Some sillimanite gemstones show pleochroism which means that several colors may be exhibited in a single gemstone depending on the viewing angle.
The main body tone of the stone is uaully reddish black but can be found in various colours like yellow black pale blue and glow red.
Sillimanite cabochons gemstone. A fibrous variety of sillimanite is traded as fibrolite. Sillimanite is an aluminum silicate and is closely related to andalusite and kyanite. Buy now and receive 10 off your first purchase.
It is a vitreous and transparent to translucent stone. Historically sillimanite is a rare gemstone known mainly to collectors. It has a refractive index of 1 655 to 1 684.
In the past these gemstones were mined in places such as sri lanka kenya burma and usa. It is a very difficult stone to cut. The cats eye that runs down the stone is a silver stripe.
Sillimanite is considered to stimulate the production of endorphins in the human body. Sillimanite gems may show a cat s eye and be cut en cabochon or they may be faceted transparent gemstones. Therefore only skilled lapidaries should attempt to do so.
Sillimanite occurs in a number of colors. Sillimanite has a hardness of 6 5 to 7 5 on the mohs scale and a vitreous to silky luster. This can be seen more often in faceted gemstones than in cabochon sillimanite gems.
Gem quality sillimanite is usually translucent and is very rarely found in transparent form. The colors of sillimanite include colorless grayish white green bluish and brownish. Sillimanite cats eye colors.
When polished as cabochons they glow mysteriously like a cats eye at night. Sillimanite is a brittle stone rating a 6 7 on the hardness scale. 63 15 carats 22 71 x 22 40 x 13 93 mm.
Sillimanite clarity and luster. Like diamond topaz and fluorite sillimanite has perfect cleavage. Sillimanite cat s eye cabochon natural brown cat s eye oval shape matched pair cabochon gemstone cat s eye smooth loose gemstone 8x7x5 mm qualityrealgems 5 out of 5 stars 2 9 00 18 00 18 00 50 off.
Approximately the same as that of spodumene its specific gravity is 3 23 to 3 27 placing it between apatite and diopside on the density scale. Compact masses of sillimanite were once used by native americans of the american southwest as fashion tools. These crystals make beautiful rings.
Beautiful sillimanite cabochons for sale online. Cat s eye sillimanite is almost always brownish in color but high quality gemstones can exhibit a very strong violet hue. Gem news 2011 v2 pala international sillimanite aka fibrolite was named after benjamin silliman a professor of chemistry and geology at yale university in 1824.
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