Crossword Genius

Chalcedony variety (5)

Ross

I believe the answer is:

agate

'chalcedony variety' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for agate that I've seen before include "Onyx" , "Quartz with bands of colour, used in jewellery" , "rock with bands" , "marble" , "Semi-transparent stone" .)

I've seen this clue in The Telegraph and The Wall Street Journal.
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