Crossword puzzle clue "like corundum"

Here are the possible solutions for like corundum clue

Answer
Clue
Relevancy
hard
Clue
Like corundum
Definition
firm and unyielding
alumina
Clue
Corundum.
Definition
an oxide of aluminum, also ALUMIN, ALUMINE
emery
Clue
Corundum
Corundum.
Abrasive that's largely corundum
Variety of corundum
It's mostly corundum
Corundum variety
Definition
to coat with emery (a polishing powder)

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