Ruby All Mp3 Songs

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Category	Oxide mineral variety
Formula (repeating unit)	aluminium oxide with chromium, Al2O3:Cr
Crystal system	Trigonal
Crystal class	Hexagonal scalenohedral (3m) H-M symbol: (3 2/m)
Space group	R3c[1]
Color	Near colorless through pink through all shades of red to a deep crimson
Crystal habit	Terminated tabular hexagonal prisms.
Cleavage	No true cleavage
Fracture	Conchoidal, splintery
Tenacity	Brittle
Mohs scale hardness	9.0
Luster	Subadamantine, vitreous, pearly (on partings)
Streak	white
Diaphaneity	transparent, translucent
Specific gravity	3.97 – 4.05
Optical properties	Uniaxial -
Refractive index	nω=1.768–1.772 nε=1.760–1.763
Birefringence	0.008
Pleochroism	Strong: purplish-red – orangy-red
Dispersion	0.018
Ultraviolet fluorescence	red under longwave
References	[2]

A ruby is a pink to blood-red colored gemstone, a variety of the mineral corundum (aluminium oxide). Other varieties of gem-quality corundum are called sapphires. Ruby is one of the traditional cardinal gems, together with amethyst, sapphire, emerald, and diamond.^[3] The word ruby comes from ruber, Latin for red. The color of a ruby is due to the element chromium.The quality of a ruby is determined by its color, cut, and clarity, which, along with carat weight, affect its value. The brightest and most valuable shade of red called blood-red or pigeon blood, commands a large premium over other rubies of similar quality. After color follows clarity: similar to diamonds, a clear stone will command a premium, but a ruby without any needle-like rutile inclusions may indicate that the stone has been treated. Ruby is the traditional birthstone for July and is usually more pink than garnet, although some rhodolite garnets have a similar pinkish hue to most rubies. The world's most expensive ruby is the Sunrise Ruby.