Granite
Granite (Silica-rich Plutonic Rock)
igneous
Category
Metamorphic Rock (Primarily Composed Of Minerals)
Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.
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Greenstone / Diabase Porphyry
Porphyritic Diabase (Micro-gabbro)
Igneous
Sandstone
Arenite (SiO2 primarily)
sedimentary
Quartz
Quartz (SiO₂)
Mineral
Green Quartzite
Quartzite (primarily SiO2 with chlorite inclusions)
metamorphic
Greenstone
Greenschist / Greenstone (containing Chlorite, Epidote, Actinolite)
metamorphic
Greenstone / Epidosite
Epidosite (primary minerals: Epidote and Quartz)
metamorphic
Granitic Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Greenstone
Greenschist (metamorphosed mafic igneous rock)
metamorphic
Dyed Dalmatian Jasper (Dalmatian Stone)
Perthitic Feldspar with Arfvedsonite inclusions
igneous
Quartz Vein in Host Rock (Gneiss/Schist)
Silicon Dioxide (SiO2) within a metamorphic matrix
metamorphic
Mica Schist
Mica Schist (primarily Muscovite and Biotite KAl2(AlSi3O10)(OH)2)
metamorphic
Gneiss (specifically a weathered or stream-worn specimen)
Gneiss (Foliated Metamorphic Rock)
metamorphic
Quartzite
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Granite
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8)
igneous
Tiger Diamond / Hematite-infused Quartzite
Silicified Hematite-Rich Quartzite (SiO2 + Fe2O3)
metamorphic
Greenstone / Metagraywacke
Metamorphosed basaltic or sedimentary rock (Complex Silicate)
metamorphic
Basalt
Basalt (Aphanitic Mafic Volcanic Rock)
igneous
Greenschist (Greenstone)
Greenschist
metamorphic
Quartzite Pebble
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Granite Gneiss with Garnet
Garnetiferous Gneiss
metamorphic
Granite (Weathered/Oxidized)
Phaneritic Felsic Igneous Rock (composed of Quartz, Orthoclase Feldspar, and Mica)
igneous
Sandstone (with Lichen)
Arenite (primarily SiO2)
sedimentary
Garnet Schist or Garnet-bearing Quartzite
Metamorphic rock containing Almandine Garnet (Fe3Al2(SiO4)3) and Quartz (SiO2)
metamorphic
Biotite Schist with Garnet
Garnet-Biotite Schist
metamorphic
Mica Schist
Mica Schist (Schistose metamorphic rock rich in Muscovite/Biotite)
metamorphic
Sandstone
Arenicola (comprising mostly Quartz, SiO2)
sedimentary
Pink Granite
Phaneritic Felsic Igneous Rock
igneous
Yellow Aventurine
Quartz (SiO2) with inclusions
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Greenstone (Greenschist)
Greenschist (composed of Chlorite, Epidote, and Actinolite)
metamorphic
Sandstone
Arenite (composed primarily of Quartz, SiO2)
sedimentary
Quartzite Pebble
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Sandstone
Arenite (primarily Quartz Arenite)
sedimentary
Granite Cobble
Granite (Phaneritic Quartz-Feldspar specimen)
igneous
Glaucophane Schist (Blueschist)
Glaucophane Schist
metamorphic
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with fibrous inclusions (commonly Dumortierite)
mineral
Granite
Phaneritic plutonic igneous rock (felsic)
igneous
Quartz Vein in Schist
Quartz (SiO2) in Mica Schist
metamorphic
Blue Apatite
Apatite group (Ca5(PO4)3(F,Cl,OH))
mineral