Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Category
Mineral Based Alloy (Anthropogenic)
Browse mineral based alloy (anthropogenic) specimens identified by the Rock Identifier community.
Tree Agate (Dendritic Agate/Quartz)
Silicon Dioxide (SiO2) with trace Manganese or Iron oxide inclusions
mineral
Dendritic Opal
Hydrated Silica (SiO2·nH2O) with Manganese or Iron Oxide inclusions
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Gneiss (Granitic Gneiss)
Gneiss (from German Gneis, related to 'spark')
metamorphic
Chert (Mudstone)
Microcrystalline Quartz (SiO2)
sedimentary
Mica Schist
Mica Schist (primarily Muscovite and Quartz)
metamorphic
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese or Iron Oxide inclusions
mineral
Quartz with Mica (Pegmatite)
Quartz (SiO2) and Muscovite (KAl2(AlSi3O10)(OH)2)
igneous
Basalt (Crushed Stone Aggregate)
Mafic Volcanic Basalt (Major Minerals: Plagioclase Feldspar, Pyroxene, Olivine)
igneous
Ironstone Concretion (Moqui Marble Type)
Goethite/Hematite-cemented Sandstone Concretion
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with hydrated iron oxide impurities (Goethite)
Mineral-based Sedimentary/Silica
Orbicular Granite (specifically Mustard or Yellow Tonalite/Granodiorite)
Orbicular Quartz Diorite / Tonalite
igneous
Brecciated Chert
Sedimentary Chert (SiO2) with Calc-Silicate mineralization
sedimentary
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily SiO2 with FeO(OH) impurities)
sedimentary
Sandstone (likely Greywacke or Lithic Sandstone)
Arenite / Wacke
sedimentary
Mica Schist
Schist (Biotite/Muscovite rich)
metamorphic
Heliotrope (Bloodstone)
Cryptocrystalline Quartz (SiO2) with inclusions of Hematite (Fe2O3)
mineral
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(F,OH)2
mineral
Tree Agate
Silicon Dioxide (SiO2)
mineral
Muscovite Mica
Muscovite / KAl2(AlSi3O10)(OH)2
mineral
Fire Agate
Silicon Dioxide (SiO2) with layers of Limonite/Goethite
mineral
Fuchsite (Green Muscovite)
K(Al,Cr)2(AlSi3O10)(OH)2
Mineral
Iron-stained Quartz (with Limonite/Hematite)
Silicon Dioxide (SiO2) with Iron Oxide inclusions (FeO(OH) or Fe2O3)
Mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 - Muscovite component)
metamorphic
Selenite
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Mica Schist
Mica Schist (primarily Muscovite and Biotite micas)
metamorphic
Schist
Mica Schist
metamorphic
Blue Quartz with Dumortierite/Magnesio-riebeckite inclusions
Quartz (SiO2) containing Dumortierite (Al7(BO3)(SiO4)3O3)
igneous/metamorphic
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Muscovite Mica
KAl2(AlSi3O10)(F,OH)2
mineral
Talc (Soapstone variety)
Talc (Hydrated magnesium silicate) - Mg3Si4O10(OH)2
mineral
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 in Matrix)
metamorphic
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Tufa (Limestone)
Calcareous Tufa (CaCO3)
sedimentary
Granite
Granite
igneous
Sandstone (likely Siltstone)
Arenite or Siltstone (high SiO2 content)
sedimentary
Citrine (likely Heat-Treated)
Quartz (Silicon Dioxide, SiO2)
mineral
Granodiorite
Phaneritic Granodiorite
igneous