Adularia

//ˌæd͡ʒʊˈlɛəɹi.ə// noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A variety of orthoclase feldspar found as colorless to white prismatic crystals in cavities in metamorphic rocks. Some specimens reflect a bluish sheen along crystal faces. This phenomenon is called adularescence, and adularia with this property is called moonstone. (See sanidine). countable, uncountable

Etymology

Named for the type locality at Adular, Switzerland.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.