
1) Beautiful stone 2) Cut mineral 3) Dark-red mineral 4) Decorative stone 5) Gemstone mineral 6) Gemstone 7) Jewel mineral 8) Jewel 9) Lustrous, dark-red mineral 10) Mineral jewel 11) Mineral 12) Mineral gemstone 13) Polished jewel 14) Polished mineral 15) Precious jewel 16) Precious gemstone 17) Precious gem
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Rutile is a mineral composed primarily of titanium dioxide, TiO2. Rutile is the most common natural form of TiO2. Two rarer polymorphs of TiO2 are known: Rutile has among the highest refractive indices at visible wavelengths of any known crystal, and also exhibits a particularly large birefringence and high dispersion. Owing to these properties, i...
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http://en.wikipedia.org/wiki/Rutile

• (n.) A mineral usually of a reddish brown color, and brilliant metallic adamantine luster, occurring in tetragonal crystals. In composition it is titanium dioxide, like octahedrite and brookite.
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http://thinkexist.com/dictionary/meaning/rutile/

the most abundant of three naturally occurring forms of titanium dioxide (TiO2; see also anatase; brookite). It forms red to reddish brown, hard, ... [3 related articles]
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http://www.britannica.com/eb/a-z/r/81
Ru'tile (ru'tĭl)
noun [ Latin
rutilus red, inclining to golden yellow.]
(Min.) A mineral usually of a reddish brown color, and brilliant metallic adamantine luster, occurring in tetragonal crystals. In composition it is titanium dioxide, like octahedrite and brookite.
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http://www.encyclo.co.uk/webster/R/107

Rutile is an accessory mineral found in igneous rock and in metamorphic gneiss and schist. It is an ore of titanium, and is a high-temperature form of titanium dioxide. It has the formulae TiO2 and a relative hardness of 6.5. It exhibits a strong lustre and is often found in twinned crystals. Rutile is found in granite, granite pegmatites, gneiss, ...
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Titanium oxide, di-
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[
n] - a mineral consisting of titanium dioxide in crystalline form
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http://www.webdictionary.co.uk/definition.php?query=rutile
noun a mineral consisting of titanium dioxide in crystalline form; occurs in metamorphic and plutonic rocks and is a major source of titanium
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https://www.encyclo.co.uk/local/20974

Titanium oxide mineral, TiO
2, a naturally occurring ore of titanium. It is usually reddish brown to black, with a very bright (adamantine) surface lustre. It crystallizes in the tetragonal system. Rutile is common in a wide range of igneous and metamorphic rocks and also occurs concentrated in sands; the coastal sands of ...
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https://www.encyclo.co.uk/local/21221
(Titanium Oxide) Rutile is an interesting, varied and important mineral. Rutile is a major ore of titanium, a metal used for high tech alloys because of its light weight, high strength and resistance to corrosion. Rutile is also unwittingly of major importance to the gemstone markets. It also forms its own interesting and beauti...
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https://www.encyclo.co.uk/local/23719

a common mineral, titanium dioxide, TiO, usually reddish-brown in color with a brilliant metallic or adamantine luster, occurring in crystals: used to coat welding rods.
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https://www.infoplease.com/dictionary/rutile
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