GARNET

Precious stone, usually red (6)

Solution has appeared in 2 crosswords (0 across and 2 down):

• Quick crossword No 15,429 — 2019-10-18 23:00:07
  4D: Glassy red, yellow or green gemstone (6)
• Quick crossword No 15,349 — 2019-07-17 23:00:08
  12D: Precious stone, usually red (6)