TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

PERISTERITE [1 record]

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Alphabetical list of terms

Record 1 1977-04-13

English

Subject field(s)
  • Mineralogy
  • Gemmology
OBS

A gem variety of albite with blue or bluish-white luster characterized by sharp internal reflections of blue, green, and yellow; an inhomogeneous, unmixed sodic plagioclase with a composition ranging between An2 (albite) and An24 (calcic oligoclase). It resembles moonstone, and is falsely called "moonstone" by jewelers.

French

Domaine(s)
  • Minéralogie
  • Gemmologie
OBS

Seule la série haute des plagioclases forme une solution solide continue. Dans la série basse il y a une lacune de miscibilité entre l'albite et un oligoclase d'environ An.25 (...) Dans cette intervalle on a un mélange de plusieurs phases nommé "péristérite". L'association est généralement tellement fine qu'elle n'est pas discernable au microscope optique, mais seulement au diffractomètre.

Spanish

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