Crossword Genius

Opaque gem (4)

Ross

I believe the answer is:

opal

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">opaque gem</span>' is the definition.<br/ ><span class="explanation-format__explanation">(opal is a kind of opaque gem)</span><br/ ><br/ >This is the entire clue.<br/ ></span>

(Other definitions for opal that I've seen before include "Semi-transparent gemstone" , "Milky white gem" , "Iridescent gemstone" , "Type of gemstone" , "Milky white gemstone" .)

I've seen this clue in The Mirror.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.