Red Sandstone
Arenite (with Iron Oxide)
sedimentary
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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Labradorite
(Ca, Na)(Al, Si)4O8 (Plagioclase Feldspar)
mineral
Shale
Shale (Sedimentary rock composed of mud/clay minerals)
sedimentary
Greenschist
Greenschist facies rock
Metamorphic
Gneiss
Foliated Metamorphic Gneiss
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Auriferous Quartz (Gold-bearing Quartz)
Silicon Dioxide (SiO2) with trace Gold (Au) and Iron Oxides
mineral
Amethyst Geode Cathedral
Amethyst (Silicon Dioxide - SiO2 with Iron impurities)
mineral
Slate
Slate (Regional metamorphic rock composed primarily of quartz, illite, and chlorite)
metamorphic
Schist (Micaceous Schist)
Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)
metamorphic
Biotite Schist
Biotite Schist (K(Mg,Fe)3AlSi3O10(OH,F)2)
metamorphic
Limonite (Iron Ore)
Limonite (an amorphous mixture of hydrated iron oxides, primarily FeO(OH)·nH2O)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Granitic Pegmatite Intrusion in Host Rock
Pegmatite dike in amphibolite or schist
igneous and metamorphic
Gneiss
Gneiss
metamorphic
Metagabbro / Epidote Gneiss
Epidote bearing Hornblende Gneiss
metamorphic
Gneiss (foliated metamorphic rock)
Gneiss
metamorphic
Granite Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Nuummite
Nuummite (Orthoamphibole rock / Anthophyllite-Gedrite blend)
metamorphic
Siltstone or Fine-grained Sandstone pebble
Siltstone (primarily SiO2 with clay minerals)
sedimentary
Fossiliferous Limestone
Calcareous biomicrite / Bioclastic limestone
sedimentary
Vesicular Basalt
Basalt
igneous
![Blue Quartz (Dumortierite Quartz) (SiO2 containing inclusions of Dumortierite [Al7(BO3)(SiO4)3O3]) — metamorphic](https://media.rock.id/blue-quartz-dumortierite-quartz-72e42d24-fbdb-4e3d-bc4b-9cfae9e59260-thumbnail.jpg)
Blue Quartz (Dumortierite Quartz)
SiO2 containing inclusions of Dumortierite [Al7(BO3)(SiO4)3O3]
metamorphic
Sandstone
Arenite (Sedimentary rock composed of sand-sized grains, primarily SiO2)
sedimentary
Schist
Mica Schist
metamorphic
Schist (Oxidized)
Mica Schist with Iron Oxide staining
metamorphic
Basalt
Basalt (Mafic Extrusive)
igneous
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Blue Quartzite
Quartzite (primarily SiO2 with inclusions like Dumortierite or Magnesio-riebeckite)
metamorphic
Oolitic Limestone
Oolite (Sedimentary rock composed of CaCO3)
sedimentary
Gneiss (with Quartz-Feldspar vein)
Gneiss (high-grade metamorphic rock) containing Quartz (SiO2) and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8)
metamorphic
Gneiss
Gneiss (high-grade metamorphic rock)
metamorphic
Greenschist
Greenschist facies rock (containing chlorite, actinolite, and epidote)
metamorphic
Granite
Granite (Phaneritic intrusion / SiO2 + KAlSi3O8 + NaAlSi3O8)
igneous
Gneiss
Gneiss
metamorphic
Sandstone (Iron-stained)
Clastic sedimentary rock (SiO2 with Fe2O3 staining)
sedimentary
Pink Granite
Phaneritic Felsic Igneous Rock (Rich in K-Feldspar)
igneous
Serpentine
Antigorite/Lizardite (Mg, Fe)3Si2O5(OH)4
metamorphic
Dalmatian Jasper
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
igneous
Sandstone (Red Arkose)
Sandstone (Arkose variant, primarily SiO2 with KAlSi3O8)
sedimentary
Basalt with Vesicular Texture
Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
igneous