Sillimanite forms as orthorhombic hexagonal crystals whereas kyanite and andalusite crystals are both formed as triclinic crystals. Sillimanite is composed of aluminum silicate which is a polymorph. Sillimanite is an extremely rare and lesser known collector s gem. Even though it is associated with all the chakras sillimanite can especially connect with the heart chakra. Chatoyant material sometimes yields catseye fibrolites which are also very rare.
Compact masses of sillimanite were once used by native americans of the american southwest as fashion tools. Sillimanite is considered to stimulate the production of endorphins in the human body. Beautiful sillimanite pairs for sale online. 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. It has a refractive index of 1 655 to 1 684.
Sillimanite gems may show a cat s eye and be cut en cabochon or they may be faceted transparent gemstones. Sillimanite is a rare transparent to opaque gemstone that occurs in colorless grayish white green bluish and brownish hues. It is popular for its healing powers and the ability to bring joy peace and prosperity to the user. It is even believed increasing energy and a general feeling of well being. Dark colored sillimanite cat s eye gems generally exhibit a pronounced and sharp cat s eye.
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Blue and greenish gems are lovely although very difficult to cut. Sillimanite occurs in a number of colors. Like diamond topaz and fluorite sillimanite has perfect cleavage. A fibrous variety of sillimanite is traded as fibrolite. Buy now and receive 10 off your first purchase.Sillimanite kyanite and andalusite all share the same chemical composition al2sio5 but each exhibit differing unique crystal structures. Like diamond topaz and fluorite sillimanite has perfect cleavage. The material from kenya is just as attractive as burmese fibrolite but seems to be somewhat smaller in size. It is a collector s gem that is more often found as cat s eye cabochons than faceted gemstones. Silliman was one of the first american professors of science and taught at yale university.
Historically sillimanite is a rare gemstone known mainly to collectors. Sillimanite is a rare and exquisite gemstone and is often called fibrolite. The colors of sillimanite include colorless grayish white green bluish and brownish. Sillimanite is rarely transparent. Sillimanite has a hardness of 6 5 to 7 5 on the mohs scale and a vitreous to silky luster.
Sillimanite has a hardness of 6 5 to 7 5 on the mohs scale and a vitreous to silky luster. Historically sillimanite is a rare gemstone known mainly to collectors. Sillimanite kyanite and andalusite all share the same chemical composition al2sio5 but each exhibit differing unique crystal structures. Blue and greenish gems are lovely although very difficult to cut. Sillimanite gems may show a cat s eye and be cut en cabochon or they may be faceted transparent gemstones.
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Sillimanite is rarely transparent. Compact masses of sillimanite were once used by native americans of the american southwest as fashion tools. Sillimanite forms as orthorhombic hexagonal crystals whereas kyanite and andalusite crystals are both formed as triclinic crystals.
