Glauconite
Glauconite (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
mineral
Category
Mineral Based Alloy (Anthropogenic)
Browse mineral based alloy (anthropogenic) specimens identified by the Rock Identifier community.
Learn about Mineral Based Alloy (Anthropogenic) in the encyclopedia
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Fire Agate
SiO2 (Silicon Dioxide with Iron Oxide inclusions)
mineral
Rough Emerald (Beryl)
Emerald (Be3Al2(SiO3)6 with Cr/V impurities)
mineral
Fuchsite
Chromium-rich Muscovite (KAl2(AlSi3O10)(OH,F)2 with Cr replacements)
mineral
Moss Agate
Cryptocrystalline Quartz (SiO2 with manganese or iron oxide inclusions)
mineral
Biotite (Black Mica)
Biotite - K(Mg,Fe)3AlSi3O10(F,OH)2
mineral
Greenstone
Metabasalt / Greenschist facies rock
metamorphic
Chert (Common Chert)
Cryptocrystalline Quartz (SiO2)
sedimentary
Porphyritic Basalt (likely artificially dyed or altered)
Basalt with plagioclase phenocrysts (likely treated)
igneous
Basalt
Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)
igneous
Mica Schist
Mica Schist (primarily Muscovite and Biotite composition)
metamorphic
Basalt with Plagioclase Microphenocrysts
Amygdaloidal or Porphyritic Basalt
igneous
Diamond (in jewelry)
Carbon (C)
mineral
Dendritic Jasper
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
sedimentary
Granite
Granite (Phaneritic intrusive igneous rock) - Composition: SiO2, Al2O3, K2O, Na2O
igneous
Gray Granite / Rhyolite
Felsic Igneous Rock (Granitoid)
igneous
Granodiorite
Granodiorite (containing Quartz, Plagioclase Feldspar, Biotite, and Hornblende)
igneous
Muscovite Mica
KAl2(AlSi3O10)(F,OH)2
mineral
Corundum (Sapphire/Ruby in Matrix)
Aluminium oxide (Al2O3)
mineral
Tree Agate
Dendritic Agate (Silicon Dioxide, SiO2)
mineral
Biotite (Black Mica)
Biotite (K(Mg,Fe)3AlSi3O10(OH)2)
mineral
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Celestite (Celestine)
Celestine (Strontium Sulfate, SrSO4)
Mineral
Basalt
Basalt (Mafic Extrusive)
igneous
Granite
Phaneritic plutonic rock composed of Quartz, Feldspar, and Mica
igneous
Sandstone (River Stone)
Arenite (composed primarily of SiO2)
sedimentary
Angel Aura Quartz (Treated Clear Quartz)
Silicon Dioxide (SiO2) coated with Vaporized Silver and Platinum
mineral
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)
igneous
Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)
igneous
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
mineral (man-enhanced)
Sandstone (Greywacke)
Arenite / Lithic Wacke (SiO2 predominant)
sedimentary
Sandstone (likely Graywacke or Lithic Sandstone)
Clastic Sedimentary Rock
sedimentary
Quartz Conglomerate
Quartz Conglomerate (clastic sedimentary rock)
sedimentary
Dalmatian Jasper
Peralkaline Quartz-Feldspar Porphyritic Rock (Dalmatian Stone)
igneous
Coquina / Shelly Limestone
Coquina (calcium carbonate, CaCO3)
sedimentary
Greisen (Quartz-Muscovite-Turretine Rock)
Greisen
Metamorphic Rock
Ferruginous Sandstone (River Pebble)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Basalt with Quartz Veins
Aphanitic Mafic Igneous Rock (primarily Plagioclase and Pyroxene) with SiO2 inclusions
igneous
Granite
Granite (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Mica (Muscovite)
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Sandstone with Manganese Dendrites/Oxide coatings
Arenite with Pyrolusite and Romanechite (MnO2)
sedimentary