Crossword Genius

Blue stone (8)

Ross

I believe the answer is:

sapphire

'blue stone' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for sapphire that I've seen before include "His paper can be turned into a jewel" , "Precious thing" , "Deep blue colour" , "Blue gemstone" , "Precious stone of rich blue" .)

I've seen this clue in The Sun.
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