Crossword Genius

Red gemstone (4)

Ross

I believe the answer is:

ruby

'red gemstone' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for ruby that I've seen before include "Deep 6 across" , "Deep red variety of corundum" , "Stony girl" , "Completely" , "Gemstone - shade of red" .)

I've seen this clue in The Independent, the Sydney Morning Herald, The Times, the LA Times, The Sun, The New York Times and The Telegraph.
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