Crossword Genius

Hard mineral (5)

Ross

I believe the answer is:

beryl

(Other definitions for beryl that I've seen before include "Girl's name - precious stone" , "Gem, fem. name" , "Transparent mineral used as a gemstone" , "Girl's name; gem" , "Girl's name - jewel" .)

I've seen this clue in The Mirror and the Evening Standard.
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