Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Category
Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites)
Browse industrial byproduct (often confused with igneous rocks or meteorites) specimens identified by the Rock Identifier community.
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Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Massive Quartz with Host Rock
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcite (CaCO3)
Mineral
Magnetite with Pyroxene
Magnetite (Fe3O4) in Mafic Igneous Matrix
mineral/igneous
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Granitic Pegmatite
Pegmatite (Quartz: SiO2, Feldspar: KAlSi3O8, Mica: KAl2(AlSi3O10)(OH)2)
Igneous
Agate
Silicon dioxide (Chalcedony), SiO2
sedimentary
Garnet in Schist/Gneiss Matrix
Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)
metamorphic
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Black Tourmaline
Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe3Al6(BO3)3Si6O18(OH)4
mineral
Blue Kyanite in Schist
Al2SiO5 in Mica Schist
metamorphic
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Epidote
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Magnetic Hematite (Man-made)
Iron Oxide (Fe2O3) with Barium-Strontium Ferrite
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Pumice
Pumice (Volcanic Glass Foam)
igneous
Agate
Silicon Dioxide (Chalcedony), SiO2
gemstone
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral / Sedimentary component
Agate
Silicon dioxide (Chalcedony), SiO2
gemstone
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Quartz (Golden Quartz / Citrine / Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Pink Feldspar
Orthoclase (KAlSi3O8)
igneous
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium impurities
mineral
Citrine
SiO2 (Silicon Dioxide)
mineral
Quartz (Variety: Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Blue Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Hypersthene
Enstatite (Hypersthene variety), (Mg,Fe)SiO3
mineral
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Faceted Quartz (Rock Crystal)
Crystalline Silicon Dioxide (SiO2)
gemstone
Geode (Small unopened nodule)
Quartz-lined nodule (SiO2)
sedimentary
Magnetite with Quartz
Magnetite (Fe3O4)
mineral
Quartz Sand
Silicon Dioxide (SiO2)
sedimentary
Citrine
Quartz (SiO₂)
mineral
Kunzite (Spodumene)
Spodumene (LiAlSi2O6)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral