Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A colorless to milky white mineral of the potassium feldspar group that forms from relatively low-temperature magmas and lacks structural homogeneity.
from The Century Dictionary.
- noun A variety of the common potash feldspar orthoclase, occurring in highly lustrous transparent or translucent crystals. It often exhibits a delicate opalescent play of colors, and is then called
moonstone (which see). Fine specimens are obtained from various localities in the Alps.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Min.) A transparent or translucent variety of common feldspar, or orthoclase, which often shows pearly opalescent reflections; -- called by lapidaries
moonstone .
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A variety of
orthoclase feldspar found as colorless to whiteprismatic crystals in cavities inmetamorphic rocks . Some specimens reflect a bluish sheen along crystal faces. This phenomenon is calledadularescence , and adularia with this property is called moonstone. (Seesanidine ).
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
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Examples
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"Moon-stone," a variety of pearly adularia presenting chatoyant rays when simply polished.
Ceylon; an Account of the Island Physical, Historical, and Topographical with Notices of Its Natural History, Antiquities and Productions, Volume 1 (of 2) James Emerson Tennent 1836
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Hasbrouck mineralization was deposited by an epithermal hot-spring system and is accompanied by pervasive silicification and oxidization, with associated adularia and pyrite.
unknown title 2011
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Similar high level alteration mapped 0.8 km to the northwest and adularia-sericite alteration mapped 1 km to the northeast suggests potential for other vein systems in the Moroshka basin.
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The veins are classified epithermal quartz-adularia-sericite type and consist fundamentally of quartz, chalcedonic quartz, minor chalcedony and local pseudomorf quartz after the calcite blade.
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Similar high level alteration mapped 0.8 km to the northwest and adularia-sericite alteration mapped 1 km to the northeast suggests potential for other vein systems in the Moroshka basin.
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The first whole was lost in deep overburden however the second hole has intersected multiple banded quartz-adularia-rhodochrosite-sulphide veins which will be sampled and submitted for analytical analysis in accordance with National Instrument 43-101 procedures.
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Pasco Canyon contains a low-sulfidation epithermal system defined at the surface by a 400 meter by 600 meter zone of boiling related breccias and quartz/adularia vein swarms.
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Hasbrouck mineralization was deposited by an epithermal hot-spring system and is accompanied by pervasive silicification, with associated adularia and pyrite.
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Within the altered area are more intensely altered quartz-adularia zones hosting the old mine workings.
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Mineralisation is associated with an assemblage consisting of quartz, chalcedony, adularia, calcite, illite, sericite and trace sulphides.
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