Quartz Vein in Gneiss or Schist
Metamorphic rock with SiO2 vein
metamorphic
Category
Sedimentary Or Metamorphic (Base Substrate)
Browse sedimentary or metamorphic (base substrate) specimens identified by the Rock Identifier community.
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Muscovite Schist
Muscovite (KAl2(AlSi3O10)(OH)2) in Schist
metamorphic
Muscovite mica schist
Muscovite-rich schist; predominantly muscovite mica (KAl₂(AlSi₃O₁₀)(OH)₂) with quartz and minor iron oxides
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Likely raw mica-bearing metamorphic rock or mineral fragment
Tentatively biotite schist; visually similar dark mica-rich material
metamorphic
Greenstone
Metamorphosed Mafic Igneous Rock
metamorphic
Quartz with Mica / Chlorite Inclusion
Silicon Dioxide (SiO2) with Phyllosilicate minerals
metamorphic
Iron-Stained Quartzite
Recrystallized Meta-Quartzite (primarily SiO2)
metamorphic
Mica Schist
Mica Schist
metamorphic
Likely chlorite-bearing schist (possibly greenschist)
Chlorite–quartz–mica schist; commonly contains muscovite/biotite and feldspar
metamorphic
Biotite mica schist
Mica schist, chiefly biotite (K(Mg,Fe)₃AlSi₃O₁₀(F,OH)₂) with quartz and feldspar
metamorphic
Biotite mica schist fragment
Biotite-rich mica schist; chiefly biotite K(Mg,Fe)3AlSi3O10(F,OH)2 with quartz and feldspar
metamorphic
Quartzite pebble
Quartzite (SiO2 based)
metamorphic
Mica Schist (with Golden/Biotite inclusions)
K(Mg,Fe)3AlSi3O10(F,OH)2 (Biotite), KAl2(AlSi3O10)(F,OH)2 (Muscovite)
metamorphic
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Pearl-bearing oyster shell
Nacreous shell, primarily aragonite (CaCO₃), with natural pearls (calcium-carbonate nacre)
fossil
Sandstone pebble
Sandstone (mainly Quartz, SiO2)
sedimentary
Mica Schist
Schist (Muscovite-Quartz Schist)
metamorphic
Quartz on Schist
Silicon Dioxide (SiO2) on Foliated Metamorphic Rock
metamorphic
Schist (Micaceous Schist)
Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)
metamorphic
Mica Schist (with Muscovite)
Muscovite Mica Schist (KAl2(AlSi3O10)(F,OH)2)
metamorphic
Mixed pebble collection, including likely flint, quartzite, and fossil material
Varied silicate rocks; visible specimen may include chert (microcrystalline SiO₂), quartzite, and a possible fossil
sedimentary
Gneiss (Metamorphic Rock)
Gneiss
metamorphic
Mica Schist with Iron Staining
Mica Schist
metamorphic
Mixed polished river stones
Likely quartz, quartzite, chert/jasper, and possibly limestone or marble
mineral
Biotite Schist
Biotite-rich Schist (K(Mg,Fe)3AlSi3O10(OH,F)2)
metamorphic
Mica Schist with Pyrite
Muscovite/Biotite Schist with Iron Sulfide (FeS2)
metamorphic
Muscovite Schist
Muscovite Mica Schist (KAl2(AlSi3O10)(OH)2)
metamorphic
Mica Schist (with Garnet)
Garnet-Mica Schist
metamorphic
Mica-bearing metamorphic rock, likely schist
Muscovite/biotite mica schist with quartz and feldspar
metamorphic
Water and Silt (Sedimentary Environment)
Suspended Sediment / H2O (dihydrogen monoxide)
sedimentary
Likely biotite-bearing metamorphic rock (schist or gneiss)
Mica schist/gneiss; chiefly quartz, feldspar, and biotite mica
metamorphic
Gneiss (with Quartz and Biotite Mica)
Gneiss
metamorphic
Micaceous Schist
Mica Schist (primarily Muscovite or Biotite KAl2(AlSi3O10)(OH)2)
metamorphic
Mica Schist
Mica Schist (primarily Muscovite and Quartz)
metamorphic
Marble
Metamorphosed Limestone (main mineral: Calcite, CaCO3)
metamorphic
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
River Pebble (Quartzite/Siltstone mixture)
Silicon Dioxide (SiO2) mixture with varied clastic minerals
sedimentary/metamorphic
Green Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
mineral
Mica Schist with Quartz and Muscovite
Muscovite-Quartz Schist
metamorphic
Rough Emerald (Beryl)
Emerald (Be3Al2(SiO3)6 with Cr/V impurities)
mineral