Red Sandstone
Arenite with Hematite (Fe2O3)
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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Quartz Vein in Host Rock (Pebble)
Quartz (SiO2) with sandstone or siltstone matrix
metamorphic/igneous transition
Porphyritic Andesite
Andesite
igneous
Quartzite
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Shale (with Iron Oxide staining)
Fissile Mudstone (primarily Quartz and Clay minerals)
sedimentary
Conglomerate
Clastic sedimentary rock (composed mostly of SiO2)
sedimentary
Mica Schist
Mica Schist (Quartz-Biotite-Muscovite Schist)
metamorphic
Gneiss
Gneiss (Metamorphic high-grade)
metamorphic
Red Quartzite Slipper Stone
Quartzite (SiO2)
metamorphic
Seraphinite
Clinochlore (Mg,Fe)5Al(AlSi3O10)(OH)8 - specific variety for Seraphinite due to its fibrous inclusions and chatoyancy.
Mineral
Jadeite (Jade)
Jadeite (NaAlSi2O6)
metamorphic
Limonite Concretion
Goethite-Limonite (FeO(OH)·nH2O)
sedimentary
Pyrite
Iron Disulfide (FeS2)
mineral
Basalt with Olivine Phenocrysts
Porphyritic Basalt (containing Mg2SiO4 - Fe2SiO4)
igneous
Limestone
Sedimentary rock composed of Calcium Carbonate (CaCO3)
sedimentary
Stromatolite
Biogenic Sedimentary Rock (composed predominantly of CaCO3)
sedimentary
Basalt
Mafic Volcanic Rock (composed of plagioclase, pyroxene, and olivine)
Igneous
Schist
Mica Schist
metamorphic
Limonite (Iron Stone)
Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Ironstone Concretion / Goethite-Hematite Nodule
Goethite/Hematite (α-FeO(OH) / Fe2O3)
sedimentary
Mica Schist
Schist (muscovite-biotite rich)
metamorphic
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Riverstone Quartzite
Quartzite (primarily SiO2)
metamorphic
Gneiss
Gneiss
metamorphic
Quartzite
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Dalmatian Jasper
Peralkaline Quartz Feldspar Porphyry
igneous
Granite
Phaneritic Felsic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)
igneous
Granite
Phaneritic Felsic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)
igneous
Granite
Plutonic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Granite
Phaneritic Felsic Igneous Rock (composed primarily of Quartz and Alkali Feldspar)
igneous
Garnet Schist
Mica Schist with Almandine (Fe3Al2(SiO4)3)
metamorphic
Serpentine
Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
igneous
Epidote in Granite Gneiss
Epidote bearing Orthogneiss (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Quartzite with inclusions
Metamorphosed Quartz-rich Rock (SiO2)
metamorphic