The clue "Lustrous gem" last appeared in the The Washington Post crossword on May 19, 2020. The correct answer for this puzzle is "OPAL", a 4-letter word.
Solution OPAL is our most searched for solution by our visitors. Solution OPAL is 4 letters long. We have 0 further solutions of the same word length.
There are 2 solutions. The longest is PEARL with 5 letters, and the shortest is OPAL with 4 letters.
Correct, clue "LUSTROUS GEM" is currently one of the top traffic spikes (detected on 11 Dec 2025). Clearly, many find it tricky to solve!
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Solutions are between 4 and 5 letters long.