Quartz
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary And Metamorphic
Browse sedimentary and metamorphic specimens identified by the Rock Identifier community.
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Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz Mineral
Silicon Dioxide (SiO2)
mineral
Hematite
Hematite (Α-Fe2O3)
mineral
Onyx Marble (Banded Calcite)
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Fragment
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon dioxide (SiO2)
Mineral
Educational Geologic Collection
Mixed Mineral and Rock Collection (Various compositions)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz Vein in Host Rock (Breccia/Rhyolite)
Silicon Dioxide (SiO2) with matrix
Mineral in Igneous/Sedimentary host
Almandine Garnet in Matrix
Almandine, Fe3Al2(SiO4)3
metamorphic
Green Aventurine
Aventurine Quartz (SiO2 with fuchsite inclusions)
Mineral
Garnet-Bearing Schist
Almandine Garnet Schist
metamorphic
Banded sandstone pebble
Quartz-rich lithic sandstone; exact provenance and composition require testing
sedimentary
Mica Schist with Quartz
Mica Schist (primarily Muscovite or Biotite with Quartz)
metamorphic
Marble
Marble (metamorphosed limestone or dolostone), primarily composed of calcite (CaCO3) or dolomite (CaMg(CO3)2)
metamorphic
Green Schist
Greenschist (Chlorite Schist)
metamorphic
Green Slate Pebble (Serpentine / Greenschist Pebble)
Greenschist / Low-grade Metamorphic Rock
metamorphic
Gneiss
Gneissic Metamorphic Rock
metamorphic
Gneiss (specifically Granitic Gneiss)
Gneissic Metamorphic Rock
metamorphic
Mica Schist with Garnet inclusions
Mica Schist (primarily Muscovite and Biotite - KAl2(AlSi3O10)(OH)2)
metamorphic
Gneiss
Gneiss (Metamorphic rock)
metamorphic
Staurolite (Fairy Cross)
Staurolite (Fe2+2Al9Si4O23(OH))
metamorphic
Magnetite (Octahedral Crystal)
Magnetite (Fe3O4)
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Almandine Garnet in Matrix
Almandine Garnet (Fe3Al2(SiO4)3) in Schist/Quartz Matrix
metamorphic
Specular Hematite (Specularite)
Iron(III) oxide (Fe2O3)
mineral
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
mineral
Kyanite
Kyanite (Al2SiO5)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
White Quartz (Milky Quartz)
Quartz (Silicon Dioxide - SiO2)
mineral
Gneiss (Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Mica)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Shale (possibly Carbonaceous or Oil Shale)
Argillaceous Sedimentary Rock
sedimentary
Pyrite
Iron Pyrite (FeS2)
Mineral
Slate
Slate (foliated metamorphic rock composed mainly of quartz, illite, and chlorite)
metamorphic