The clue "Black gemstone" last appeared in the New York Times crossword on October 7, 2025. The correct answer for this puzzle is "ONYX", a 4-letter word.
Solution ONYX is our most searched for solution by our visitors. Solution ONYX is 4 letters long. We have 0 further solutions of the same word length.
There are 6 solutions. The longest is ANDRADITE with 9 letters, and the shortest is JET with 3 letters.
Correct, clue "BLACK GEMSTONE" is currently one of the top traffic spikes (detected on 20 Feb 2026). Clearly, many find it tricky to solve!
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Solutions are between 3 and 9 letters long.