Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A yellow to white, glassy monoclinic mineral of the potassium feldspar group that forms from relatively high-temperature magmas.
from The Century Dictionary.
- noun A variety of orthoclase feldspar, occurring in glassy transparent crystals in lava, trachyte, and other volcanic rocks, chiefly those of comparatively recent age. It usually contains more or less soda.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Min.) A variety of orthoclase feldspar common in certain eruptive rocks, as trachyte; -- called also
glassy feldspar .
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun mineralogy A variety of
orthoclase feldspar found astabular crystals embedded involcanic rocks . It sometimes reflects a blue sheen along crystal planes. This phenomenon is called adularescence, and sanidine with this property is called moonstone.
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
[Greek sanis, sanid-, board (from its flat crystals) + –ine.]
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Examples
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It comes from Mount Caetano up north in Lander County and is loaded with smoky quartz and a mineral called sanidine.
CSI: Crime Scene Investigation: Skin Deep Jerome Preisler 2010
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a pumiceous tufa, rich in sanidine and of a characteristic greenish colour.
A Study of Recent Earthquakes Charles Davison 1899
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a massive rock of light gray to pink color and of fine grain, which shows small crystals of quartz and sanidine in a streaky and glossy ground mass.
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