ONYXES

Set to 3 different clues across 3 published puzzles, most often “Biblical breastplate stones” — The New York Times, Sunday, 5 June 2011.

6 letters

Every clue on record, most used first

Biblical breastplate stonesonce
The New York Times — Sunday, 5 June 2011
Features of some cameosonce
The New York Times — Sunday, 6 March 2005
They may make cameo appearancesonce
The New York Times — Saturday, 30 September 1995