Rock Microsection (Unspecified)
Image: <a rel="nofollow" class="external text" href="https://www.flickr.com/people/12584677@N06">Leo-setä</a> (CC BY 2.0)
Mineral NameRock Microsection (Unspecified)
Chemical FormulaVaries by constituent minerals
Mohs HardnessVaries by constituent minerals
Streak ColorNot discernible in thin section
CleavageVaries by constituent minerals; some show distinct cleavage
FractureNot discernible in thin section
Specific GravityVaries by constituent minerals
Colorswhite, grey, black, brown, red, purple, blue, green
TransparencyTransparent (as thin section)
Type LocalityNot specified
Mineral GroupSilicates (e.g., quartz, feldspar, micas, amphiboles, pyroxenes), possibly minor oxides
UsesScientific study (petrography), Geological research
Associated MineralsQuartz, Feldspar, Biotite, Amphibole, Pyroxene
Description
A microscopic image of a rock thin section under polarized light, showing an interlocking mosaic of various mineral grains with diverse interference colors and some exhibiting twinning or cleavage.
Geological Context
This texture is characteristic of crystalline igneous rocks (e.g., granite, gabbro) or high-grade metamorphic rocks (e.g., gneiss), formed by slow cooling of magma or recrystallization under intense heat and pressure.
