Associations to the word «Corundum»

Wiktionary

CORUNDUM, noun. (mineral) An extremely hard mineral, a form of aluminum oxide with the chemical formula Al2O3, that occurs in the form of the gemstones sapphire and ruby; it is used as an abrasive.

Dictionary definition

CORUNDUM, noun. Very hard mineral used as an abrasive.

Wise words

Trust only movement. Life happens at the level of events, not of words. Trust movement.
Alfred Adler