Why corundum finds many applications in abrasives, refractories and ceramics?

Corundum (Al₂O₃) is a crystalline form of aluminum oxide and exhibits remarkable properties that make it ideal for various applications in abrasives, refractories, and ceramics.

In abrasives, corundum's hardness is the key factor. It is second only to diamond in terms of hardness, making it highly effective for grinding, polishing, and _______ ________ ______ __________ ________ _________ ____.
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