Meaning & use
dioptase
Last updated
a deep emerald-green mineral composed of hydrous copper silicate, occasionally used as a gemstone.
See it in a sentence
The museum's mineral collection included a striking cluster of dioptase crystals.
Collectors prize dioptase for its intense green color, though it's too soft for most jewelry.
A note on using this word
Dioptase is prized by mineral collectors for its vivid color but is rarely used in jewelry because it's relatively soft and fragile.
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