Cryptocrystalline
From Wikipedia, the free encyclopedia
(Redirected from Cryptocrystal)
 |
This article does not cite any references or sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (March 2007) |
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 acidic type such as felsites and rhyolites, may have a cryptocrystalline groundmass as distinguished from pure obsidian (acidic) or tachylyte (basic), which are natural rock glasses. Onyx is also a cryptocrystalline.
[edit] See also
- List of rock textures
- Rock microstructure
- Chalcedony
- Agate
- Microcrystalline
- Nanocrystalline
- Macrocrystalline
 |
This article related to petrology is a stub. You can help Wikipedia by expanding it. |
