Granite Pebble
Granite (composition of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Category
Metamorphic Rock (Composed Of Multiple Minerals)
Browse metamorphic rock (composed of multiple minerals) specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock (Composed Of Multiple Minerals) in the encyclopedia
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Green Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix
Metamorphic or Igneous (context dependent)
Ferruginous Quartz (Iron-stained Quartzite)
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
metamorphic
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Pyrite in Slate
Iron Disulfide (FeS2) in Low-grade Metamorphic Rock
metamorphic
Gold
Native Gold (Au)
Mineral
Magnetite
Magnetite (Fe3O4)
mineral
Shale (Beach-worn)
Laminated Pelite (primarily clay minerals and quartz)
sedimentary
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Rough Green QuartzITE / Green Aventurine
Aventurine Quartz (SiO2 + Cr-muscovite inclusions)
metamorphic
Quartz / Quartzite
Silicon Dioxide (SiO2)
metamorphic
Quartzite (Aventurine type)
Metamorphosed Quartz Sandstone (SiO2 with inclusions)
metamorphic
Greenstone / Nephrite Jade
Tremolite-actinolite series (Ca2(Mg,Fe)5Si8O22(OH)2)
metamorphic
Feldspathic Gneiss
Feldspathic Gneiss (High-grade regional metamorphic rock)
metamorphic
Almandine Garnet in Matrix
Almandine (Fe3Al2(SiO4)3)
metamorphic
Granite
Granite (Phaneritic Igneous Rock)
igneous
Quartzite
Quartzite (primarily SiO2)
metamorphic
Planet Earth
Gaia (Silicate Terrestrial Planet)
metamorphic
Greenstone / Greenschist
Chlorite schist / Meta-basalt
metamorphic
Emerald In Matrix
Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium
mineral
Greenstone
Greenschist / Meta-basalt
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Granodiorite
Granodiorite (phaneritic intrusive igneous rock)
igneous
Blue Apatite
Calcium Phosphate (Ca5(PO4)3(F,Cl,OH))
mineral
Amethyst
SiO2 (Silicon Dioxide with Iron impurities and natural radiation influence)
mineral
Quartz (Milky or Common Quartz)
Silicon Dioxide (SiO2)
mineral
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Granite
Granite
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Granodiorite
Granodiorite
igneous
Granite
Granite (Phaneritic Quartz-Feldspar rock)
igneous
Quartz-bearing Ore (likely Gold-bearing Quartz)
Quartz (SiO2) with potential sulfide mineralization (Pyrite/Arsenopyrite)
mineral/hydrothermal
Ferruginous Sandstone
Sandstone with Iron Oxide (Limonite/Goethite)
sedimentary
Sandstone (likely Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Porphyritic Andesite
Andesite (Intermediate Extrusive Volcanic Rock)
igneous
Red Jasper (Brecciated Jasper)
SiO2 (Silicon Dioxide) with Ferric Iron inclusions
sedimentary
Quartz Crystal (Amethyst)
Silicon Dioxide (SiO2)
mineral
Phyllite
Phyllite (Foliated metamorphic rock)
metamorphic
Anyolite (Ruby in Zoisite)
Zoisite with inclusions of Corundum; Ca2Al3(SiO4)3(OH) + Al2O3
metamorphic
Turquoise in Matrix
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous