Quartzite Pebble (River Rock)
Metamorphic Quartzite (predominantly SiO2)
metamorphic
Category
Mixed (Sedimentary, Igneous, And Metamorphic)
Browse mixed (sedimentary, igneous, and metamorphic) specimens identified by the Rock Identifier community.
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Dalmatian Jasper
Peralkaline rhyolite
igneous
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 - Muscovite component)
metamorphic
Greenschist / Migmatite
Regional Metamorphic Complex (Facies: Greenschist to Amphibolite)
metamorphic
Quartzite
Quartzite (chiefly SiO2)
metamorphic
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Marble
Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)
metamorphic
Mica Schist
Mica Schist (primarily Muscovite and Biotite KAl2(AlSi3O10)(OH)2)
metamorphic
Adventurine (Green)
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Anthracite Coal
Anthracite (Carbon-based organic sedimentary/metamorphic rock)
metamorphic
Coal (Anthracite)
Anthracite (Carbon-based organic sedimentary/metamorphic rock)
metamorphic
Epidote
Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)
Mineral
Yellow Quartzite (River Stone)
Quartzite (primarily SiO2)
metamorphic
Garnet Schist
Garnetiferous Micaceous Schist
metamorphic
Yellow Quartzite (Onyx Pebble)
Silicon Dioxide (SiO2) - Quartzite
metamorphic
Black Star Diopside
Diopside (CaMgSi2O6) with Magnetite inclusions
mineral
Dyed Agate
Silicon Dioxide with artificial pigment (SiO2)
sedimentary
Chalcopyrite
Chalcopyrite (CuFeS2)
mineral
Quartz (Rock Crystal) with minor impurities
Quartz (SiO2)
Mineral
Blue Quartz
Quartz (SiO2) with inclusions
Mineral
Greenstone
Greenschist (primarily composed of chlorite, actinolite, and epidote)
metamorphic
Conglomerate with Quartz Inclusions
Conglomerate (clastic sedimentary rock) with internal Quartz (SiO2)
sedimentary
Mica Schist
Mica Schist (Schistose metamorphic rock rich in Muscovite/Biotite)
metamorphic
Orange Calcite
Calcite (CaCO3)
Mineral
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Amazonite
Amazonite (KAlSi3O8) - a variety of Microcline Feldspar
Mineral
Aventurine (likely Green Aventurine)
Silicon Dioxide (SiO2) with various inclusions
Mineral, variety of Quartz
Marble
Metamorphosed Limestone (CaCO3)
metamorphic
Iron-stained Quartzite / Chert
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
metamorphic
Quartzite with Iron Banding
Metamorphosed Quartz-rich Sandstone (SiO2 with Fe2O3 inclusions)
metamorphic
Anthracite Coal
Anthracite (Carbon Content: 86%-97%)
metamorphic
Mica Schist
Mica Schist (Composition typically contains Muscovite: KAl2(AlSi3O10)(OH)2 or Biotite: K(Mg,Fe)3AlSi3O10(OH)2 along with Quartz and Feldspar)
metamorphic
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Chalcedony (Common Opal variant)
Silicon dioxide (SiO2) with varying levels of hydration
mineral
White Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Agate Nodule / Weathered Chert
SiO2 (Silicon Dioxide - Microcrystalline Quartz)
Sedimentary / Mineral
Pyrite (Fool's Gold) Cube
Iron Sulfide (FeS2)
mineral
Granitic Gneiss
Gneiss (Polymetamorphic Granitic Gneiss)
metamorphic
Blue Kyanite
Kyanite (Al2SiO5)
mineral