Definition of dioptase in English:
A rare mineral occurring as emerald green or blue-green crystals. It consists of a hydrated silicate of copper.
- 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.
Early 19th century: from French, formed irregularly from Greek dioptos 'transparent'.
Definition of dioptase in:
- US English dictionary
What do you find interesting about this word or phrase?
Comments that don't adhere to our Community Guidelines may be moderated or removed.