Definition of dioptase in English:

Share this entry

dioptase

Pronunciation: /dʌɪˈɒpteɪz/

noun

[mass noun]
A rare mineral occurring as emerald green or blue-green crystals. It consists of a hydrated silicate of copper.
Example sentences
  • For digital photography, SoLux bulbs are perfect, yielding accurate rendition of difficult-to-photograph minerals such as dioptase and azurite.
  • Many of the best Tsumeb cerussite, dioptase, azurite, smithsonite, and other specimens passed through his hands en route to some faraway collection.
  • Tantara dioptase occurs well crystallized with quartz, plancheite, shattuckite, fornacite, and chrysocolla.

Origin

Early 19th century: from French, formed irregularly from Greek dioptos 'transparent'.

Share this entry
 

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.