Travertine
Terrestrial Sedimentary Limestone (CaCO3)
sedimentary
Category
Mineral And Metamorphic Rock
Browse mineral and metamorphic rock specimens identified by the Rock Identifier community.
Learn about Mineral And Metamorphic Rock in the encyclopedia
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Quartzite
Quartzite (Primary mineral: Silicon Dioxide, SiO₂)
metamorphic
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartzite (Milky Quartz pebble)
Silicon Dioxide (SiO2)
metamorphic
Gneiss
Gneiss
metamorphic
Mica Schist
Schist (muscovite-biotite rich)
metamorphic
Green Quartzite (or Green Jasper)
Silica (Silicon Dioxide, SiO2) with inclusions
metamorphic
Banded Gneiss with Quartz Veining
Gneiss (High-grade Regional Metamorphism)
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Gneiss (Schistose)
Gneiss
metamorphic
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Tumbled Agate
Silicon Dioxide (SiO2)
mineral
Banded Gneiss (River Cobble)
Gneiss (High-grade regional metamorphic rock)
metamorphic
Banded Chert or Unakite-like Rock
Epidotized Granulite or Jasperoid Chert
metamorphic
River Stone / Pebble
Clastic Sediment (composed largely of Quartz, Feldspar, and various rock fragments)
Mineral, Sediment
Pyritic Gneiss (with Garnet)
Gneiss containing Pyrite (FeS2) and Almandine Garnet (Fe3Al2(SiO4)3)
metamorphic
Clear Quartz
Silicon Dioxide (SiO2) / Rock Crystal
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite with Hematite staining
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Copper-Bearing Sulfide Ore (likely Chalcopyrite or Bornite)
Chalcopyrite (CuFeS2) or Bornite (Cu5FeS4) in host rock
mineral
Quartzite Cobble
Metamorphosed Sandstone (SiO2)
metamorphic
Quartz (River Siltstone Quartzite Pebble)
Silicon Dioxide (SiO2)
metamorphic
Schist
Mica Schist (Quartz-Muscovite-Biotite Schist)
metamorphic
Schist
Mica Schist
metamorphic
Granite (with Almandine Garnet inclusions)
Granite composed primarily of Quartz (SiO2), K-Feldspar (KAlSi3O8), and Almandine Garnet (Fe3Al2(SiO4)3)
igneous
Polished orbicular jasper
Orbicular jasper; microcrystalline quartz (SiO₂) with iron oxides and altered volcanic minerals
metamorphic
Clear quartz sphere
Quartz (silicon dioxide, SiO₂), likely rock crystal or low-grade milky quartz
mineral
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Unakite (likely epidote–feldspar rock)
Epidote–K-feldspar–quartz aggregate; commonly approximated as pink orthoclase/microcline + green epidote + quartz
metamorphic
Garnet-Bearing Gneiss
Almandine-Garnet Gneiss
metamorphic
Yellow Quartzite (River Pebble)
Quartzite (SiO2)
metamorphic
Lapis Lazuli
Lapis Lazuli (Metamorphic rock primarily composed of Lazurite, Calcite, and Pyrite)
rock
Quartz
Silicon Dioxide (SiO2)
Mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Aventurine
Quartz (Aventurine variety)
Mineral
Epidote
Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
Mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral