Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Category
Metamorphic Rock (Primarily Composed Of Minerals)
Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Iron Meteorite (Individual)
Siderite (composed of Kamacite and Taenite minerals)
igneous
Gneiss
Gneiss
metamorphic
Schist (Garnet-Mica Schist)
Garnet-Mica Schist
metamorphic
Blue Tiger's Eye
Crocidolite in Quartz (altered)
Mineral
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Chalk
Calcareous Ooze (composed primarily of coccoliths)
Sedimentary Rock
Quartz (likely)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Oolitic Limestone
Oolitic Carbonate (CaCO3)
sedimentary
Mica Schist
Mica Schist (Intermediate-grade Metamorphic Rock)
metamorphic
Basalt Porphyry
Porphyritic Basalt
igneous
Granite
Phaneritic Intrusive Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)
igneous
Quartz Vein in Host Rock
Quartz (SiO2) in Mafic or Sedimentary Matrix
igneous
Banded Gneiss
Gneiss (Metamorphic high-grade rock)
metamorphic
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
metamorphic
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Mica Schist
Mica Schist (Complex Silicate Rock)
metamorphic
Milky Quartz with Country Rock contact
Silicon Dioxide (SiO2) in contact with Metamorphic/Igneous rock
mineral
Schist (Kyanite Schist)
Kyanite-Mica Schist (primarily Al2SiO5, KAl2(AlSi3O10)(OH)2, and SiO2)
metamorphic
Smoky Quartz and Biotite Schist
Quartz-Biotite Schist (SiO2 + K(Mg,Fe)3AlSi3O10(F,OH)2)
metamorphic
Gneiss
Gneiss (a rock type, not a specific mineral with a formula)
Metamorphic Rock
Specular Hematite with Pyrite
Iron Oxide (Fe2O3) with Iron Sulfide (FeS2)
mineral
Quartz
Silicon Dioxide (SiO2)
Mineral
Epidote
Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Schist
Schist (various mineralogical compositions including mica, chlorite, talc, etc.)
Metamorphic
Sapphirine in Matrix
Sapphirine (Mg,Al)8(Al,Si)6O20
mineral
Almandine Garnet in Schist Matrix
Almandine - Fe3Al2(SiO4)3
metamorphic
Granite
Granite (composed primarily of Quartz SiO2 and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8))
igneous
Conglomerate
Conglomerate
Sedimentary Rock
Gastropod Steinkern (Internal Mold Fossil)
Gastropoda (Class); Internal mold or 'Steinkern' composed of Calcium Carbonate (CaCO3) or Sedimentary matrix
sedimentary
Gneiss (Granitic Gneiss)
Gneiss (from German Gneis, related to 'spark')
metamorphic
Lapis Lazuli
Lapis lazuli (complex rock composed of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Pyrite, and Calcite)
metamorphic
Black Spinel
Magnesium Aluminum Oxide (MgAl2O4)
mineral
Sandstone
Sandstone (clastic sedimentary rock), primarily SiO2
sedimentary
Banded Gneiss
Gneiss (Metamorphic high-grade rock)
metamorphic
Sapphirine in Magnesian Schist
Sapphirine: (Mg,Al)8(Al,Si)6O20
metamorphic
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Basalt with Granite Inclusions (Xenoliths)
Mafic igneous rock (Basalt) with Sialic minerals
igneous
Limestone
CaCO3 (principally composed of Calcite)
sedimentary