Mineral/Igneous/Metamorphic association
Quartz with inclusions (likely Chlorite or Hornblende) and country rock
SiO2 (Quartz) with associated ferromagnesian minerals
Quartz: Hardness 7, white/colorless, vitreous luster, conchoidal fracture. Greenish part: likely chlorite-rich or epidote-rich altered rock.
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Physical properties
Quartz: Hardness 7, white/colorless, vitreous luster, conchoidal fracture. Greenish part: likely chlorite-rich or epidote-rich altered rock.
Formation & geological history
Formed in hydrothermal veins or pegmatites intruding into surrounding country rock, often undergoing metamorphism or alteration.
Uses & applications
Specimen collecting, sometimes lapidary use if solid enough. Quartz is used in various industries.
Geological facts
The parallel, almost fibrous-looking inclusions or growth patterns in the quartz suggest a dynamic growth environment, potentially a fault vein or shear zone (slickenlines/slickensides).
Field identification & locations
Identified by the hardness of quartz (scratches glass) contrasting with the softer greenish altered minerals. Common in mountainous, geologically active, or ancient shield regions worldwide.
More like this
Other mineral/igneous/metamorphic association specimens
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Epidote
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Epidote
Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Epidote (Greenstone)
Calcium aluminum iron silicate hydroxide Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)
metamorphic
Gemstones (Emerald and Yellow Topaz or Citrine)
Beryl (Be3Al2Si6O18) and Quartz (SiO2) or Topaz (Al2SiO4(F,OH)2)
mineral