Quartz Cobble (River Rock)
Silicon Dioxide (SiO2)
mineral
Category
Mineral In Metamorphic Rock
Browse mineral in metamorphic rock specimens identified by the Rock Identifier community.
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Copper Ore / Altered Granodiorite
Cupriferous rock with silicate gangue
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Quartz (Quartzite fragment)
Silicon Dioxide (SiO2)
mineral
Gneiss (Metamorphic Pebble)
Metamorphic Rock (Quartz-Feldspar-Biotite Gneiss)
metamorphic
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Serpentine
Serpentinite (group of minerals: (Mg,Fe,Ni,Al)3Si2O5(OH)4)
metamorphic
Banded Gneiss
Gneiss (pronounced "nice")
metamorphic
Banded Gneiss
Gneiss
Metamorphic
Epidote (likely Pistacite in Epidosite rock)
Epidote: Ca2(Al,Fe)3(SiO4)3(OH)
metamorphic
Serpentine
Serpentine group ((Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
metamorphic
Mica Schist (with Muscovite mica)
Mica Schist (KAl2(AlSi3O10)(OH)2)
metamorphic
Magnetite
Magnetite (Fe3O4)
mineral
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz Vein in Host Rock
Crystalline Silicon Dioxide (SiO2) in Igneous/Metamorphic Matrix
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Banded Iron Formation (Fragment)
Banded Iron Formation (BIF)
sedimentary
Gneiss
Gneiss
metamorphic
Banded Gneiss
Gneiss
metamorphic
Jade (Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)
Metamorphic Rock / Mineral
Basalt with Quartz Vein
Mafic volcanic rock with hydrothermal SiO2 filling
igneous
Ruby in Zoisite
Anyolite (Ruby-Zoisite)
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Fulgurite
Fulgurite (Lechatelierite), amorphous SiO2
metamorphic
Mica Schist
Mica Schist (Predominantly Muscovite/Biotite)
metamorphic
Quartzite River Rock (with Limonite staining)
Quartzite (SiO2)
metamorphic
Quartzite Pebble
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Quartzite River Stone
Quartzite (SiO2)
metamorphic
Serpentine (Serpentinite)
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Pebble Gravel Mix (Quartzite, Basalt, Chert)
Alluvial River Gravel / Aggregate Clasts
sedimentary
Polished red gemstone pendant, likely red jasper or brecciated jasper
Jasper: microcrystalline quartz (SiO₂), commonly with hematite or iron-oxide inclusions
metamorphic
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Quartzite Pebble with Feldspar Vein
Quartzite (SiO2) with Feldspar (KAlSi3O8)
metamorphic
Quartz
Quartz (SiO₂)
Mineral
Quartzite
Quartzite (primarily SiO2)
Metamorphic
Schist
Mica Schist
metamorphic
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite (or Ferruginous Quartzite)
Metamorphosed Quartz Sandstone (SiO2 with Fe2O3 impurities)
metamorphic
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Pyrite in Slate
Iron Sulfide (FeS2) in Slate host matrix
metamorphic