Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Category
Metamorphic And Mineral
Browse metamorphic and mineral specimens identified by the Rock Identifier community.
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Quartz Vein in Matrix (Gneiss/Schist)
Silicon Dioxide (SiO2) in Metamorphic Rock Matrix
metamorphic
Almandine Garnet in Schist
Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist
metamorphic
Quartzite Pebble
Metamorphic Quartzite
metamorphic
Quartz vein fragment
Quartz, silicon dioxide (SiO₂), likely milky to translucent quartz with iron-oxide or clay inclusions
mineral
Likely quartz-rich stone (possibly milky quartz or quartzite)
Quartz, silicon dioxide (SiO₂), or quartzite if interlocking grains are present
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Iron-stained garnet-bearing rock, possibly almandine garnet
Garnet-group silicate, likely almandine (Fe₃Al₂Si₃O₁₂), in a quartz–iron-oxide matrix
mineral
Rhodonite
Rhodonite (Mn,Fe,Mg,Ca)SiO3
mineral
Greenschist
Greenschist facies metamorphic rock; commonly chlorite–actinolite–epidote schist
metamorphic
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Rhodonite
Rhodonite (MnSiO₃), a manganese inosilicate
mineral
Schist
Metamorphic Rock (Schist)
metamorphic
Garnet (Almandine variety)
Almandine Garnet (Fe3Al2(SiO4)3)
mineral
Magnetite (Lodestone variant potential)
Magnetite (Fe3O4)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Fossilized marine shell fragment
Likely a bivalve or gastropod shell preserved as calcite (CaCO₃)
fossil
Banded gneiss
Quartz–feldspar gneiss, possibly biotite-bearing; exact identification requires testing
metamorphic
Muscovite mica
Muscovite, KAl₂(AlSi₃O₁₀)(OH)₂
mineral
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
Mineral
Epidote
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
mineral
Ruby Fuchsite / Ruby in Fuchsite
Ruby (Al2O3 variety corundum) and Fuchsite (K(Al,Cr)2AlSi3O10(OH)2 - a chromium-rich variety of muscovite mica) in Quartz matrix
Mineral
Banded gneiss
Gneiss, likely biotite–quartz–feldspar gneiss
metamorphic
Quartz Mineral
Silicon Dioxide (SiO2)
mineral
Banded gneiss
Foliated silicate rock, typically quartz–feldspar–mica gneiss
metamorphic
Almandine Garnet
Almandine - Fe3Al2(SiO4)3
mineral
Tiger's Eye
Quartz pseudomorph after crocidolite (SiO2)
gemstone
Prehnite
Prehnite, Ca2Al2Si3O10(OH)2
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2) with Limonite/Goethite
mineral
Polished Hematite Tower
Hematite (Fe2O3)
mineral
Banded Metamorphic Rock
Gneiss or Schist
metamorphic
Fuchsite
Fuchsite (a variety of Muscovite mica, K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Mica Schist
Metamorphic Rock (Schistose)
metamorphic
Gneiss (with Mica and Quartz)
Gneissic Metamorphic Rock
metamorphic
Weathered foliated metamorphic rock, likely schist or phyllite
Micaceous quartz–feldspar schist/phyllite; exact identification requires microscopy or testing
metamorphic
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
metamorphic
Gneissic Schist
Gneiss-schist (Metamorphic rock)
metamorphic
Pyrite
Iron sulfide (FeS2)
mineral
Biotite (Black Mica)
Biotite - K(Mg,Fe)3(AlSi3O10)(F,OH)2
mineral
Blue Quartz (Blue Aventurine)
Silicon Dioxide with inclusions (SiO2)
mineral