fire opal

fire opal (plural fire opals)

Any transparent to translucent opal with a warm body colour of yellow, orange, or red.
- 1922, E[ric] R[ücker] Eddison, The Worm Ouroboros: A Romance, London: Jonathan Cape […], →OCLC, page 2:
  […] the body of each high seat was a single jewel of monstrous size: the left-hand seat a black opal, asparkle with steel-blue fire, the next a fire-opal, as it were a burning coal, the third seat an alexandrite, purple like wine by night but deep sea-green by day.

reddish opal

English