Quartzite with inclusions
Metamorphic Rock (Mainly SiO2)
metamorphic
Category
Metamorphic Rock (Primarily Composed Of Minerals)
Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock (Primarily Composed Of Minerals) in the encyclopedia
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Zircon
Zircon (Zirconium Silicate - ZrSiO4)
mineral
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss
Metamorphic Gneiss
metamorphic
Quartzite (Yellow/Orange variety)
Quartzite (primarily SiO2)
metamorphic
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Coarse Sand or Fine Gravel
Detrital Sedimentary Fragments (mostly SiO2)
sedimentary
Quartz Vein in Host Rock (often Granite or Schist)
Silicon Dioxide (SiO2) within host matrix
mineral with metamorphic or igneous host
Granite
Felsic Plutonic Rock (Granite)
igneous
Quartz Vein in Siltstone
Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix
metamorphic
Iron-stained Quartzite
Metamorphosed Quartz (SiO2) with Hematite/Limonite impurities
metamorphic
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Sandstone
Sandstone (clastic sedimentary rock), primarily SiO2
sedimentary
Gneiss
Gneiss
metamorphic
Banded Gneiss
Gneiss (pronounced 'nice')
metamorphic
Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of K-feldspar, Quartz, and Biotite)
igneous
Granite
Granite (composed primarily of Quartz SiO2 and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8))
igneous
Sandstone
Arenite
sedimentary
Sapphirine in Magnesian Schist
Sapphirine: (Mg,Al)8(Al,Si)6O20
metamorphic
Mixed Gemstone Collection
SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)
mineral
Greenstone
Greenschist-facies basaltic rock
metamorphic
Lapis Lazuli
Lapis lazuli (complex rock composed of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Pyrite, and Calcite)
metamorphic
Basalt
Extrusive mafic igneous rock
igneous
Pink Gneiss / Pink Granite Gneiss
Felsic Gneiss (dominated by Orthoclase Feldspar and Quartz)
metamorphic
Granite Gneiss
Felsic Gneiss
metamorphic
Shale
Argillite / Shale
sedimentary
Quartz (Rutilated)
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
mineral
Milky Quartz in Gneiss
Quartzite / Foliated Gneiss containing SiO2
metamorphic
Gneiss
Gneiss
metamorphic
Garnet Schist
Almandine Garnet in Schist (X3Al2(SiO4)3)
metamorphic
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Feldspar (Orthoclase)
Potassium Feldspar (KAlSi3O8)
mineral
Black Spinel
Magnesium Aluminum Oxide (MgAl2O4)
mineral
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Garnet Gneiss
Gneiss containing almandine-pyrope garnet
metamorphic
Sapphirine in Matrix
Sapphirine (Mg,Al)8(Al,Si)6O20
mineral
Unakite (Epidotized Granite)
Epidotized Granite (composed of Epidote, Orthoclase, and Quartz)
metamorphic
Slate
Slate (a fine-grained, foliated metamorphic rock). Mineral composition: Primarily composed of mica minerals (muscovite, chlorite, sericite) and quartz, with minor amounts of hematite, pyrite, and other accessory minerals.
sedimentary