Quartz Vein in Host Rock (likely Sandstone or Mudstone)
Silicon Dioxide (SiO2) within Sedimentary Matrix
sedimentary
Category
Mineral (Evaporite)
Browse mineral (evaporite) specimens identified by the Rock Identifier community.
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Amazonite
Amazonite (KAlSi3O8)
mineral
Rainbow Moonstone with Black Tourmaline
White Labradorite (Feldspar variety, (Na,Ca)(Al,Si)4O8) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Anyolite (Ruby in Zoisite)
Zoisite with inclusions of Hornblende and Ruby (Ca2Al3(SiO4)3(OH))
metamorphic
Tourmalinated Quartz
Silicon Dioxide (SiO2) with Schorl inclusions (NaFe2+3Al6(BO3)3Si6O18(OH)4)
mineral
Ethiopian Fire Opal
Hydrated Silica (SiO2·nH2O)
mineral
Chlorastrolite (Isle Royale Greenstone)
Chlorastrolite (Pumpellyite-(Mg,Al)), formula: Ca2(Mg,Fe)Al2(SiO4)(Si2O7)(OH)2∙H2O
mineral
Bornite
Copper Iron Sulfide (Cu5FeS4)
mineral
Chalcopyrite (Peacock Ore)
Chalcopyrite (CuFeS2)
mineral
Amygdaloidal Rhyolite
Amygdaloidal felsic extrusive rock
igneous
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite mica)
Mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Gneissic Schist
Foliated Metamorphic Rock (Schist/Gneiss transition)
metamorphic
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Quartz Geode or Druzy Quartz in Host Rock
Silicon Dioxide (SiO2)
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
Limonite (Iron Ore)
Limonite (Hydrated Iron Oxide, FeO(OH)·nH2O)
Mineral
Chrysocolla on Matrix
Hydrated copper phyllosilicate mineral (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Chrysocolla in Matrix
Hydrated copper phyllosilicate mineral (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Magnetite with Pyrite or Chalcopyrite inclusions
Magnetite (Fe3O4) with Pyrite (FeS2)
mineral
Diorite
Intermediate plutonic igneous rock
igneous
Schist (Micaceous Schist)
Mica Schist
metamorphic
Pyrite in Shale
Iron Sulfide (FeS2) in Sedimentary Matrix
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
mineral
Shale
Shale (Lutite)
sedimentary
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Pyrite
Iron Disulfide (FeS2)
mineral
Rough Ruby
Corundum (Al2O3 with Chromium impurities)
mineral
Breciated Limestone with Calcite Veins
Sedimentary Breccia (CaCO3)
sedimentary
Moonstone (Feldspar)
Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8)
mineral
Shale
Shale (Argillaceous sedimentary rock)
sedimentary
Sandstone (Quartz-rich)
Arenite (Quartz Arenite)
sedimentary
Quartz (Riverstone / Cobble)
Silicon Dioxide (SiO2)
mineral
Green Aventurine (Tumbled Quartzite)
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Amygdaloidal Rhyolite (often called Lake Superior Agate relative)
Rhyolite with Calcite/Quartz amygdules (SiO2 and secondary minerals)
igneous
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz with Iron Oxide Inclusions
Silicon Dioxide (SiO2) with Hematite/Limonite
mineral
Clear/White Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Peach Aventurine
Quartz variety (SiO2 + Hematite/Goethite inclusions)
mineral
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock with secondary mineral fillings)
igneous
Pyrite
Iron Pyrite (FeS2)
mineral