˜yÐÄvlog

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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

/ ˌæ»åÂáʊˈ±ôɛə°ùɪə /

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
“Collins English Dictionary — Complete & Unabridged†2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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˜yÐÄvlog History and Origins

Origin of adularia1

1790–1800; < Italian < French adulaire, named after Adula a mountain group in Switzerland; -ary
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˜yÐÄvlog History and Origins

Origin of adularia1

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

Examples have not been reviewed.

But one of the prettiest though commonest gems in the island is the "Moon-stone," a variety of pearly adularia presenting chatoyant rays when simply polished.

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