Schist (Micaceous Schist)
Schist (containing mainly Muscovite and Quartz)
metamorphic
Category
Sedimentary Or Metamorphic (Low Grade)
Browse sedimentary or metamorphic (low grade) specimens identified by the Rock Identifier community.
Learn about Sedimentary Or Metamorphic (Low Grade) in the encyclopedia
View all →
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Limonitic Gossan
Goethite/Limonite aggregate after sulfide
igneous and metamorphic derivative (weathered)
Basalt (Greenstone)
Extrusive mafic igneous rock
igneous
Greenstone / Basalt
Aphanitic Mafic Igneous Rock (likely altered Basalt)
igneous
Basalt with Epidote Veins
Mafic Igneous Rock (Basalt)
igneous
Basalt (with possible Serpentinization)
Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
igneous
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Gneissic boulder
Gneiss, typically quartz–feldspar–mica gneiss
metamorphic
Banded Gneiss River Pebble
Gneiss
metamorphic
Gneiss (Metamorphic Rock Pebble)
Foliated Metamorphic Rock (Quartz-Feldspar Gneiss / Granitic Gneiss)
metamorphic
Gneiss
Gneiss
metamorphic
Granite / Gneiss (Felsic Metamorphic or Igneous Rock)
Gneiss (or weathered Granite)
metamorphic
Gneiss (Cobble)
Gneiss
metamorphic
Gneiss (with Quartz-Feldspar vein)
Gneiss (high-grade metamorphic rock) containing Quartz (SiO2) and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8)
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Quartz with Schist Matrix
Crystalline Silicon Dioxide (SiO2) in micaceous schist
metamorphic
Schist (Micaceous Schist)
Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)
metamorphic
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Mica Schist
Mica Schist (primarily Muscovite or Biotite-rich sequence)
metamorphic
Alexandrite in Matrix
Chrysoberyl (BeAl2O4 with Chromium impurities)
mineral
Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Gneiss
Gneiss
metamorphic
Banded Gneiss with Quartz Vein
Gneiss containing SiO2 (Quartz) intrusion
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss (Metamorphosed Pebble)
Gneiss with Quartz/Feldspar banding
metamorphic
Granite Gneiss
Gneiss (Polymetamorphic Quartz-Feldspar-Mica rock)
metamorphic
Gneiss (Granite Gneiss)
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Schist with Biotite Inclusion
Biotite-bearing Mica Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)
metamorphic
Tumbled or rough turquoise-like specimen
Turquoise, hydrated copper aluminum phosphate — CuAl₆(PO₄)₄(OH)₈·4H₂O; identification is uncertain from the image
mineral
Blue Apatite
Apatite-(CaF), Ca5(PO4)3F
mineral
Gneiss (specifically a granitic gneiss cobble)
Gneiss (high-grade regional metamorphic rock)
metamorphic
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Green Aventurine
Silicon dioxide (SiO2) with inclusions of Fuchsite
mineral
Rough Emerald in Matrix
Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Citrine (Heat-treated Amethyst)
Citrine Quartz (SiO2)
Mineral (Tectosilicate)