Cryptocrystalline is a rock texture made up of such minute crystals that its crystalline nature is only vaguely revealed even microscopically in thin section by transmitted polarized light. Among the sedimentary rocks, chert and flint are cryptocrystalline. Carbonado, a form of diamond, is also cryptocrystalline. Volcanic rocks, especially of the ...
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http://en.wikipedia.org/wiki/Cryptocrystalline
• (a.) Indistinctly crystalline; -- applied to rocks and minerals, whose state of aggregation is so fine that no distinct particles are visible, even under the microscope.
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http://thinkexist.com/dictionary/meaning/cryptocrystalline/
A stone having a crystalline structure so finely fused together that no distinct crystals are recognizable under a microscope, such as cryptocrystalline quartz agate or jadeite jade. As distinct from a transparent single unit crystal like diamond or ruby.
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http://www.agt-gems.com/Book/Glossary/
Having very minute crystals. ... (05 Mar 2000) ...
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http://www.encyclo.co.uk/local/20973
Extremely small crystals which cannot be seenseparately, even under high magnification.
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http://www.encyclo.co.uk/local/22148
Composed of tiny, microscopic crystals.
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http://www.encyclo.co.uk/local/22291
Cryp`to·crys'tal·line adjective [ Greek
krypto`s hidden + English
crystalline .]
(Geol.) Indistinctly crystalline; -- applied to rocks and minerals, whose state of aggregation is so fine that no distinct particles are visible, even under the microscope.
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http://www.encyclo.co.uk/webster/C/197
Type: Term Pronunciation: krip′tō-kris′tă-lēn Definitions: 1. Having very minute crystals.
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http://www.medilexicon.com/medicaldictionary.php?t=21697
cryptocrystalline A reference to rocks that are composed of crystals too small to be seen with a petrological microscope.
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http://www.wordinfo.info/words/index/info/view_unit/2455/2
Possessing crystals so small that they cannot be distinguished by a microscope.
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https://walkerceramics.com.au/resources/glossary-of-ceramic-terms/
said of mineral materials that consist of individual mineral units that are distinguishable only under a microscope; cf. microcrystalline.
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https://www.encyclo.co.uk/local/20132
when the crystals are so small, they cannot be seen except with a microscope
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https://www.encyclo.co.uk/local/21692
Cryptocrystalline describes a rock's texture which is so finely crystalline that its crystalline nature is only visible microscopically by viewing a thin section by transmitted polarized light.
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https://www.encyclo.co.uk/local/22070
having a microscopic crystalline structure.
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https://www.infoplease.com/dictionary/cryptocrystalline
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