Spinel

==Properties of true spinel== Spinel crystallizes in the isometric system; common crystal forms are octahedra, usually twinned. It has an imperfect octahedral cleavage and a conchoidal fracture. Its hardness is 8, its specific gravity is 3.5–4.1 and it is transparent to opaque with a vitreous to dull luster. It may be colorless, but is usually v...
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Spinel

• (n.) Bleached yarn in making the linen tape called inkle; unwrought inkle. • (n.) Alt. of Spinelle
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spinel

noun a hard glassy mineral consisting of an oxide of magnesium and aluminum; occurs in various colors that are used as gemstones
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Spinel

Spin'el noun Bleached yarn in making the linen tape called inkle ; unwrought inkle. Knight.
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Spinel

A compound containing a mixture of one or more metal oxides.
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spinel

A hard, semiprecious gemstone that ranges in colour from red to black, often resembling a ruby. Spinels can also be blue, green and yellow, depending on the concentration of iron compounds within them. Spinels have a hardness of 8 on the Mohs Scale
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spinel

Any of a group of `mixed oxide` minerals consisting mainly of the oxides of magnesium and aluminium, MgAl2O4 and FeAl2O4. Spinels crystallize in the cubic system, forming octahedral crystals. They are found in high-temperature igneous and metam...
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Spinel

Magnesium aluminate
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spinel

magnesium aluminate, MgAl2O4.
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spinel

mineral composed of magnesium aluminum oxide (MgAl2O4) or any member of a group of rock-forming minerals, all of which are metal oxides with the ... [3 related articles]
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Spinel

Spinel is a common metamorphic mineral occurring imbedded in crystalline limestone, gneisses, and serpentine. Spinel occurs as a common accessory mineral in many dark igneous rocks. When transparent and finely coloured it is often confused for ruby and is used as a gem stone. An oxide of magnesium and aluminium it has the formulae MgAl2O4 and a rel...
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spinel

spinel, magnesium aluminum oxide, MgAl2O4, a mineral crystallizing in the isometric system, usually as octahedrons. It occurs as an accessory mineral in basic igneous rocks, in aluminum-rich metamorphic rocks, and in contact-metamorphosed limestones. Common spinel usually ranges in color from dark g...
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spinel

[n] - a hard glassy mineral consisting of an oxide of magnesium and aluminum
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