Listing dsrption
Corundum is a crystalline form of aluminium oxide (Al2O3)
typically containing traces of iron, titanium, vanadium and chromium.[2][3] It is a rock-forming mineral. It is a naturally transparent
material, but can have
different colors when impurities are present. Transparentspecimens are used as gems, called ruby if
red and padparadscha if pink-orange. All other colors
are called sapphire, e.g., green sapphire for a green
specimen.
Detaild description
The name "corundum" is derived from the Tamil word Kurundam, which
originates from the Sanskrit word Kuruvinda meaning ruby.[6]
Because of corundum's hardness (pure corundum is defined to have
9.0 on the Mohs scale),
it can scratch almost every other mineral. It is commonly used as an abrasive on everything from sandpaper to large machines used in
machining metals, plastics, and wood. Some emery is a mix of corundum and other
substances, and the mix is less abrasive, with an average Mohs hardness of 8.0.
In addition to its hardness, corundum is unusual for its density
of 4.02 g/cm3, which is very high for a transparent mineral composed
of the low-atomic mass elements aluminium and oxygen.
PRICE FOR ALUMINA CONTENT
$1.7/KG OR $0.77/IB
For more information:
mobile: +2348039721941
contact person: emeaba uche
e-mail: emeabau@yahoo.com
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