oligoclase

English

Etymology

From oligo- +‎ -clase.

Noun

oligoclase (usually uncountable, plural oligoclases)

  1. (mineralogy) A plagioclase feldspar, the second member of the Albite-Anorthite solid solution series. Primarily found as small crystals in impure marble. Oligoclase contains a small amount of calcium substituting for some of the sodium in its formula. Oligoclase with reddish-golden inclusions found in Norway and Canada is called sunstone.

See also

Further reading

  • David Barthelmy (1997–2025) “Oligoclase”, in Webmineral Mineralogy Database.
  • “oligoclase”, in Mindat.org‎[1], Hudson Institute of Mineralogy, 2000–2025.

Anagrams

French

Noun

oligoclase f (plural oligoclases)

  1. oligoclase

Further reading

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