Corundum Mineral


Corundum mineral is an oxide.

It forms at very high temperatures either in hot veins or deep down in mangma.





It is therefore a very hard mineral - the second hardest after diamond on Mohs Hardness Scale.

It is an aluminium oxide and it forms hexagonal crystals.

corundum


It has a few gemstone varieties including ruby and sapphire.

minerals corundum

Ruby is the red variety, while sapphire can be blue, green, yellow and even colourless.












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