Meaning of the word corundum in English

What does corundum mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

corundum

US /kəˈrʌndəm/
UK /kəˈrʌndəm/

Noun

a very hard mineral consisting of aluminum oxide, occurring in crystalline form as sapphire or ruby and used as an abrasive

Example:
Sapphire and ruby are both forms of corundum.
Due to its hardness, corundum is often used in abrasives.