Green Quartz (including Prase or Aventurine variants)
Silicon Dioxide (SiO2) with inclusions (likely Actinolite or Chlorite)
mineral
Category
Metamorphic Rock (Primarily Composed Of Minerals)
Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.
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Basalt with Porphyritic Texture
Porphyritic Basalt
igneous
Basalt with Quartz/Calcite Veins
Aphanitic Mafic Igneous Rock (Hydrothermal Veined)
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Crushed Granite Gravel
Granite (composed primarily of Quartz, Alkali Feldspar, and Plagioclase Feldspar)
igneous
Granodiorite
Granodiorite
igneous
Orthoclase Feldspar
KAlSi3O8 (Potassium aluminum silicate)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Serpentine
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Lapis Lazuli
Lapis Lazuli (a rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2, with varying amounts of Calcite, Pyrite, and Sodalite).
Mineral
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Labradorite (a variety of Feldspar)
Labradorite; (Na,Ca)(Al,Si)4O8 (a plagioclase feldspar)
igneous
Greenstone (Metabaltic/Greenschist)
Chlorite schist / Meta-basalt
metamorphic
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Hypersthene (or Enstatite/Ferrosilite)
Orthopyroxene series (Mg,Fe)SiO3 - specifically, historically hypersthene (intermediate member) now referred to as Enstatite (Mg-rich) or Ferrosilite (Fe-rich)
Mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium aluminum silicate)
mineral
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Schist
Mica Schist
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Tiger's Iron
Pseudomorphic Quartz Aggregate (contains SiO2 with Fe2O3 and FeOOH)
metamorphic
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Diorite
Phaneritic Intermediate Igneous Rock
igneous
Granite Gneiss
Gneiss (derived from granitic protolith)
metamorphic
Jadeite Jade
Jadeite (NaAlSi2O6)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Peach Moonstone Sphere
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Garnet
Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3
Mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Shale
Shale (clastic sedimentary rock)
Sedimentary
Sandstone (likely Arkosic)
Clastic Sedimentary Rock (primarily SiO2 with Feldspar)
sedimentary
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Blue Quartz (Dumortierite Quartz)
SiO2 with inclusion of AlAl6BSi3O18
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Quartz Vein in Metamorphic Rock
Silicon Dioxide (SiO2) within Metasedimentary host
metamorphic
Mica Schist
Mica Schist (primarily muscovite and biotite)
metamorphic
Pyrite in Shale
Iron Sulfide (FeS2)
mineral
Siltstone with Weathering Rind
Siltstone (composed of microscopic quartz and clay minerals)
sedimentary
Granite Pebble
Intrusive Felsic Igneous Rock (Granite)
igneous
Pyrite (on Quartz/Host Rock)
Iron Sulfide (FeS₂)
mineral
Mica Schist
Mica Schist (Main mineral constituents: Muscovite/Biotite, Quartz, Feldspar)
metamorphic
Quartz (Druzy) in host rock
SiO₂ (Silicon Dioxide) as Quartz, with unspecified host rock components (likely silicates and iron oxides)
Mineral
Jadeite (Nephrite-Jadeite blend)
Jadeite (NaAlSi2O6)
metamorphic