water sapphire
English
Etymology
Equivalent to French saphir d'eau.
Noun
water sapphire (plural water sapphires)
- (mineralogy) A deep blue variety of iolite, sometimes used as a gem.
References
- Mindat
- “water sapphire”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.