Eclogite
Image: <a href="//commons.wikimedia.org/wiki/User:Strekeisen" title="User:Strekeisen">Strekeisen</a> (CC BY-SA 4.0)
Mineral NameEclogite
Chemical FormulaComplex, primarily (Mg,Fe)3Al2Si3O12 (garnet) and (Ca,Na)(Mg,Fe,Al)Si2O6 (omphacite)
Mohs Hardness5
Streak ColorWhite to pale
CleavageVariable, good in omphacite and glaucophane, none in garnet
FractureVariable, typically conchoidal to uneven
Specific Gravity3.3
Colorspink, green, pale blue, white, black
TransparencyOpaque
Type LocalityWorldwide in high-pressure metamorphic terrains (e.g., Alps, Norway, California)
Mineral GroupMetamorphic rock (composed of silicates)
Usesscientific study, geological research, collector
Associated Mineralsgarnet, omphacite, glaucophane, rutile, kyanite, quartz
Rarityuncommon
Description
This image displays a thin section of eclogite, a high-pressure metamorphic rock, characterized by granular pink garnet, green omphacite, and pale blue glaucophane, showing a mosaic texture.
Geological Context
Eclogites form under extreme pressures and high temperatures, typically in subduction zones or deeply buried continental crust, providing crucial insights into deep Earth processes.
