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adularia

[ aj-uh-lair-ee-uh ]

noun

, Mineralogy.
  1. a sometimes opalescent variety of orthoclase formed at a low temperature.

adularia

/ ˌædjʊˈlɛərɪə /

noun

  1. a white or colourless glassy variety of orthoclase in the form of prismatic crystals. It occurs in metamorphic rocks and is a minor gemstone. Formula: KAlSi 3 O 8

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Word History and Origins

Origin of adularia1

1790–1800; < Italian < French adulaire, named after Adula a mountain group in Switzerland; -ary

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Word History and Origins

Origin of adularia1

C18: via Italian from French adulaire, after Adula, a group of mountains in Switzerland

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