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Ancient Greek impostor, deceiver, because of its resemblance to quartz.


phenacite (plural phenacites)

  1. (mineralogy) A clear glassy mineral, a silicate of glucina, occurring in rhombohedral crystals and sometimes used as a gem.

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for phenacite in
Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.)