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[moon-stohn] /ˈmunˌstoʊn/
Also called precious moonstone. a semitransparent or translucent, opalescent, pearly-blue variety of adularia, used as a gem.
any of several adularescent feldspars, as certain varieties of albite, labradorite, or oligoclase, used as gems.
(not used technically) any milky or girasol stone used as a gem.
Origin of moonstone
1625-35; moon + stone Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for moonstone
Historical Examples
  • He has over and over again solemnly declared that, until this scandal assailed him, he had never even heard of the moonstone.

    The Moonstone Wilkie Collins
  • You may discover so much by reading the "moonstone," that monument of ingenuity and absurdity.

    Hieroglyphics Arthur Machen
  • The particular feldspar that furnishes most of the moonstone is orthoclase, a silicate of potassium and aluminum.

  • The opal and the moonstone are the gems most often figuring in these tales.

    The Myths and Fables of To-Day Samuel Adams Drake
  • Did you know that I said I was going to leave the moonstone?

    Overland Red Henry Herbert Knibbs
  • Howard Archie was "respected" rather than popular in moonstone.

    Song of the Lark Willa Cather
  • He was himself satisfied that the moonstone had been pledged to Mr. Luker.

    The Moonstone Wilkie Collins
  • Nobody in moonstone ever found what Wunsch's first name was.

    Song of the Lark Willa Cather
  • By the time Thea's fifteenth birthday came round, she was established as a music teacher in moonstone.

    Song of the Lark Willa Cather
  • Her hair, moonstone women admitted, would have been very pretty "on anybody else."

    Song of the Lark Willa Cather
British Dictionary definitions for moonstone


a gem variety of orthoclase or albite that is white and translucent with bluish reflections
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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