Quartz
Silicon Dioxide (SiO2)
Mineral
Category
Metamorphic And Sedimentary
Browse metamorphic and sedimentary specimens identified by the Rock Identifier community.
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Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Muscovite Mica in Quartz
Potassium Aluminum Silicate Hydroxide (KAl2(AlSi3O10)(OH)2) and Silicon Dioxide (SiO2)
metamorphic
Fragmented Sedimentary Pebble
Clastic Sedimentary Specimen
sedimentary
Clay Brick
Ceramic structural unit (Al2O3·2SiO2·2H2O as precursor)
metamorphic (man-made/anthropogenic)
Quartz (Milky or Smoky Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Giallo Ornamental Granite
Phaneritic Igneous Rock (composed of Quartz, Feldspar, and Mica)
igneous
Marble
Metamorphosed Limestone (mainly CaCO3)
metamorphic
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Greenstone
Greenschist / Greenstone (contains epidote, chlorite, and actinolite)
metamorphic
Pink Marble or Rose Quartz (Likely Pink Marble based on carving texture)
Recrystallized Calcite (CaCO3)
metamorphic
Greenschist
Greenschist (Chlorite Schist)
metamorphic
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Slate
Foliated Metamorphic Rock (primarily composed of Muscovite, Chlorite, and Quartz)
metamorphic
Calcite
Calcite (Mineral, Calcium Carbonate - CaCO3)
Mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Metamorphic Rock (variety of Quartz)
Pink Quartzite
Quartzite (principally Silicon Dioxide, SiO2)
metamorphic
Greenstone / Greenschist
Greenschist (composed primarily of Chlorite, Epidote, and Actinolite)
metamorphic
Schist
Mica Schist
metamorphic
Schist
Mica Schist (primarily composed of quartz, feldspar, and mica)
metamorphic
Mica Schist
Muscovite/Biotite Schist
metamorphic
Banded Gneiss with Quartz Vein
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Granite Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Marble
Metamorphic rock primarily composed of Calcite (CaCO3)
metamorphic
Iron-stained Quartzite
Metamorphic Quartz (SiO2) with limonite/hematite staining
metamorphic
Quartzite (River Pebble)
Metamorphic rock consisting primarily of Quartz (SiO2)
metamorphic
Quartzite
Metamorphic rock primarily composed of Quartz (SiO2)
metamorphic
Quartzite with Iron Inclusions
Metamorphic Quartzite (SiO2 with Fe2O3 trace impurities)
metamorphic
Quartzite
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Lapis Lazuli
Lazurite-rich metamorphic rock (complex silicate)
metamorphic
Quartzite
Metamorphic rock primarily composed of Quartz (SiO2)
metamorphic
Granite Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Quartzite Pebble
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within a metamorphic matrix
metamorphic
Greenschist
Chlorite schist
metamorphic
Garnet
Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3
Mineral
Rhodonite
Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3
mineral
Shale (Beach-worn)
Laminated Pelite (primarily clay minerals and quartz)
sedimentary
Iolite-bearing Gneiss (Cordierite)
Cordierite (Mg2Al4Si5O18) in Gneiss matrix
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic
Bornite
Copper Iron Sulfide (Cu5FeS4)
mineral
Serpentine
Antigorite/Lizardite (Mg, Fe)3Si2O5(OH)4
metamorphic