It is strongly Anisotropic, in that its hardness varies depending on its Crystallographic direction. While this is a feature of all most all minerals, in Kyanite this Anisotropism can be considered an identifying characteristic. View Complete Details. Sillimanite found in our mines is granular and it is associated with Kyanite. The grain texture and color buff distinguishes it from Kyanite.
Bricks manufactured from Sillimanite process high softness point, neutral pH. Resistance to corrosive action of slag and great mechanical strength at high temperature. Pavri Kyanite Mine Nagpur, Maharashtra. View Mobile Number. Download Brochure. Send Email. Getting to the Bluebird Mine is not difficult. It can be accomplished in even fairly low-slung, two-wheel-drive vehicles. Angle eastward onto American Girl Mine Road.
Although this road was carefully maintained by the mining company until , with the closure of the mine such maintenance ceased. Because now it probably will be subject to unrepaired washouts and other problems, you should proceed with caution despite the width and smoothness of some stretches. Road to Buebird Mine Quarry. Approximately six-tenths of a mile from Ogilby Road you will drive past some small structures off to the right. They house pumps for the wells that supplied water for the American Girl Mine, a major gold producer.
Some 2. To the right, ahead, will be two hills that appear to be separate from the Cargo Muchacho Range. In fact, it is possible to drive all the way around either one. The easternmost, and by far the higher, is Vitrefax Hill. The lower one, almost straight ahead, is Bluebird Hill. About 2. Then turn left onto the steep, rough road extending from the flat below Bluebird Hill to its top. If you have a four-wheel-drive vehicle, you can probably drive the road to the top of the hill.
Just take it easy. Another road, not so steep, reaches the top from the south end of the hill. Kyanite is a gemstone that you will rarely encounter in the typical jewelry store. Most people have not heard of kyanite, as it is infrequently used in jewelry. It is an "exotic" gem. Perhaps that is what makes it so interesting? If you are interested in kyanite as a gemstone or in jewelry, the best place to find it is in artisan jewelry stores or in jewelry stores that are associated with a mineral dealer.
The people who own these businesses are likely to be interested in kyanite and incorporate it into their product line. High-quality and nicely colored kyanite can be cut into attractive and desirable cabochons and faceted stones. These are often used in rings, earrings, pendants, and other jewelry. Kyanite is also used to make beads. These beads often have a flat geometry because the mineral typically occurs in thin blades. Faceted kyanite: A faceted kyanite gemstone with a beautiful deep blue color.
Kyanite is a challenging mineral to cut because it has two distinctly different hardnesses. Kyanite crystals are typically long, narrow blades. They have a hardness of about 4. Skilled cutters are needed to work these stones. Specimen is about four inches ten centimeters across.
Most gemstone-quality kyanite is blue in color. However, kyanite can be clear, green, black, and rarely purple. Some kyanite gemstones are pleochroic appear to be different colors when viewed from different directions. Blue kyanite stones can be found in a continuous color range between clear and dark blue.
The heavy sink product from the heavy-media separator is screened at about 35 mesh to recover the ferrosilicon media. Most sillimanite is mined by hand from massive-sillimanite deposits consisting of huge segregations of sillimanite and corundum, commonly in intimate association and weighing several tons.
Considerable hand effort is employed to recover the boulders in a form suitable for sawing to refractory shapes, particularly for the English glass industry. Kyanite and its related minerals are used to make a variety of refractory materials. Refractory materials are those that are resistant to very high temperatures.
As a result, more than half of the kyanite consumed is used in refractories for the production of steel. Kyanite is also used to produce refractories for nonferrous non-iron-bearing metals. Some is consumed to make refractories for glass and heat-resistant ceramics. Kyanite is also used to make spark plugs and is used for non-refractory applications. Skip to content Return to Minerals Database. Crystal System Triclinic kyanite , orthorhombic Color Blue, white, rarely green, gray, yellow, pink, orange, and black, can be zoned kyanite ; Colorless to pale pink or grey mullite ; Pink, violet, yellow, green, white, gray; in thin section, colorless to pink or green andalusite ; Colorless or white to gray, also brown, yellow, yellow-green, gray-green, blue-green, blue; colorless in thin section sillimanite.
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