Crossword Genius

Gemstone (4)

Ross

'gemstone' is the definition.
(I know that ruby is a type of gemstone)

This is all the clue.

(Other definitions for ruby that I've seen before include "Precious red gem" , "Gemstone comprising mainly aluminium oxide" , "Gemstone - shade of red" , "Red precious stone" , "Completely" .)

I've seen this clue in The Telegraph, The Guardian, the Evening Standard, The Independent, The Mirror and The Times.
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