For other uses, see Ruby (disambiguation).

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- align=center bgcolor="#FF0000" Ruby

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- align=center Ruby crystal before faceting,
length 0.8 inches (2 cm).

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- align=center bgcolor="#FF0000" General

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- CategoryMineral

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- Chemical formula aluminium oxide with chromium, Al₂O₃::Cr

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- align="center" bgcolor="#FF0000" Identification

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- Color Red, may be brownish

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- Crystal habit Varies with locality. Terminated tabular hexagonal prisms.

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- Crystal system Trigonal

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- Cleavage No true cleavage

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- Fracture Uneven or conchoidal

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- Mohs Scale hardness 9.0

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- Luster Vitreous

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- Refractive index ~1.77

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- Pleochroism ?

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- Streak white

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- Specific gravity 4.0

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- Fusibility perfectly

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- Solubility ?

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- align="center" bgcolor="#9966FF" Major varieties

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- Pink sapphire Caused by a color impurity
and makes the stone
appear pink. Ruby is a red gemstone, a variety of the mineral corundum (aluminium oxide) in which the color is caused mainly by chromium. Its name came from ruber, Latin for red. Natural rubies are exceptionally rare, but artificial rubies (sometimes called created ruby) can be manufactured by the Verneuil process fairly cheaply. Other varieties of gem-quality corundum are called sapphires.

Rubies are mined in Africa, Asia, Australia, and Greenland. They are most often found in Myanmar (= Burma), Sri Lanka, Kenya, Madagascar, and Thailand, but they have been found in the U.S. states of Montana, North Carolina and South Carolina. The Mogok Valley in Myanmar has produced some of the finest rubies. However, in recent years very few good rubies have been found there. In central Myanmar the area of Mong Hsu also produces rubies. In 2002 rubies were found in the Waseges River area of Kenya. Rubies are being mined at Audilamena in northeastern Madagascar. Sometimes spinels are found along with rubies in the same rocks and are mistaken for rubies. However, fine red spinels may approach the average ruby in value.

Rubies have a hardness of 9.0 on the Mohs scale of mineral hardness, and among the natural gems, only diamonds are harder.

More on [ Ruby ]

Price Above Rubies, A - Twitter Search

The Mentalist – A Price Above Rubies (2.09) / Throwing Fire (2.10) http://bit.ly/7XcnTu
Critictoo (Critictoo) Fri, 18 Dec 2009 10:28:32 -0000
The Mentalist – A Price Above Rubies (2.09) / Throwing Fire (2.10) http://bit.ly/7XcnTu
Episode 9 : A Price Above Rubies http://toptvon9.com/?p=742
luthf (Saufi) Thu, 17 Dec 2009 15:07:26 -0000
Episode 9 : A Price Above Rubies http://toptvon9.com/?p=742
I rated a YouTube video (5 out of 5 stars) -- The Mentalist - A Price Above Rubies - 'Bout It http://bit.ly/5CF9Ms
Shantanel_BxB (Alexandra Ilchenko) Thu, 17 Dec 2009 06:26:51 -0000
I rated a YouTube video (5 out of 5 stars) -- The Mentalist - A Price Above Rubies - 'Bout It http://bit.ly/5CF9Ms
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Shantanel_BxB (Alexandra Ilchenko) Thu, 17 Dec 2009 06:20:58 -0000
I favorited a YouTube video -- The Mentalist - A Price Above Rubies - 'Bout It http://bit.ly/5CF9Ms
Acabei de ver: The Mentalist - S2E9 - A Price Above Rubies
ferkobaia (Fernando Kobaia) Thu, 17 Dec 2009 06:07:32 -0000
Acabei de ver: The Mentalist - S2E9 - A Price Above Rubies
The Mentalist S02E09 A Price Above Rubies HDTV XviD-FQM: The.Mentalist.S02E09.A.Price.Above.Rubies.HDTV.XviD-FQ.. http://tinyurl.com/yeaf6zz
tinydl_news (Tinydl) Thu, 17 Dec 2009 05:38:27 -0000
The Mentalist S02E09 A Price Above Rubies HDTV XviD-FQM: The.Mentalist.S02E09.A.Price.Above.Rubies.HDTV.XviD-FQ.. http://tinyurl.com/yeaf6zz

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