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Corundum is a mineral that is commonly used as a gemstone. It is one of the hardest minerals at 9 on the Mohs Scale. Corundum can be found in many colors, such as white, but can be found in the form of minerals like rubies and sapphires in different colors. Corundum is commonly used industrially for things such as abrasives and machine parts.
Previously featured on the Geology Wiki: Obsidian
A picture of the Mount Carleton in New Brunswick.
Geology (from Greek γη- (ge-, "the earth") and λογος (logos, "word", "reason")) is the science and study of the solid matter of the earth, its composition, structure, physical properties, history and the processes that shape it. It is one of the Earth sciences.
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