OPAL
Set to 84 different clues across 135 published puzzles, most often “Milky gem” — The New York Times, Monday, 15 February 2010.
4 letters
Every clue on record, most used first
- Milky gem8 times
The New York Times — Monday, 15 February 2010
- Fire ___7 times
The New York Times — Wednesday, 24 December 2008
- Shade of blue6 times
The New York Times — Wednesday, 5 September 2001
- Iridescent gem5 times
The New York Times — Monday, 26 May 2008
- Milky white gem4 times
The New York Times — Monday, 26 October 2009
- October birthstone4 times
The New York Times — Monday, 19 February 2007
- Stone for many Libras3 times
The New York Times — Tuesday, 30 June 2009
- Form of silica3 times
The New York Times — Wednesday, 13 May 2009
- Word with black or fire3 times
The New York Times — Thursday, 6 March 2008
- October gem3 times
The New York Times — Tuesday, 26 February 2008
- Iridescent stone3 times
The New York Times — Wednesday, 24 August 2005
- Fall birthstone2 times
The New York Times — Monday, 16 November 2009