Crossword Genius

Gemstone (4)

Ross

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">gemstone</span>' is the definition.<br/ ><span class="explanation-format__explanation">(onyx is a kind of gemstone)</span><br/ ><br/ >This is all the clue.<br/ ></span>

(Other definitions for onyx that I've seen before include "Kind of agate" , "Type of agate" , "Form of chalcedony" , "Striped agate" , "Quartz used as a gem" .)

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