Quartz Mineral
Silicon Dioxide (SiO2)
mineral
Category
Mineral (Impactite)
Browse mineral (impactite) specimens identified by the Rock Identifier community.
Learn about Mineral (Impactite) in the encyclopedia
View all →
Limonite (Ironstone)
Limonite (FeO(OH)·nH2O)
mineral
Weathered copper-bearing rock, possibly chrysocolla-bearing quartz or host rock
Indeterminate from the photo; possible chrysocolla (hydrated copper silicate) with quartz or other host minerals
mineral
Quartz Mineral
Silicon Dioxide (SiO2)
mineral
Gold Mineral
Native Gold (Au)
mineral
Travertine
Calcium Carbonate (CaCO3)
sedimentary
Limonite (Yellow Ochre)
Hydrated iron(III) oxide-hydroxides (FeO(OH)·nH2O)
mineral
Limonite (Iron Ore)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Granite
Intrusive igneous felsic rock
igneous
Turquoise
Turquoise, CuAl6(PO4)4(OH)8·4H2O
mineral
Milky quartz cluster
Quartz, silicon dioxide (SiO₂)
mineral
Sandstone with Manganese Dendrites
Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)
sedimentary
Pink-purple rough mineral specimen (possibly lepidolite-bearing mica)
Lepidolite, a lithium-rich mica; identification is uncertain from the photo
mineral
Quartz Vein in Hematitic Siltstone
Hydrothermal Quartz (SiO2) in Ferriferous Matrix
metamorphic
Yellow iron-oxide-rich mineral/rock fragment
Likely limonite/goethite (hydrated iron oxides; commonly approximated as FeO(OH)·nH₂O)
mineral
Jade (likely Jadeite)
Jadeite (a pyroxene mineral) or Nephrite (a variety of amphibole mineral)
Mineral
Likely garnet-bearing rock (possibly almandine garnet in dark matrix)
Garnet, probably almandine (Fe₃Al₂(SiO₄)₃); host rock is not identifiable from this image
metamorphic
Sodalite
Na8Al6Si6O24Cl2
mineral
Banded quartz-rich rock (possibly pegmatite)
Likely quartz–feldspar pegmatite; identification is tentative from the photo
igneous
Milky quartz (rough quartz specimen)
Quartz, silicon dioxide (SiO₂)
mineral
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Granite
Granite (Plutonic Igneous Rock)
igneous
Granitic Gneiss
Gneiss (Metamorphic rock of granitic composition)
metamorphic
Gneiss
Gneiss (Metamorphic rock)
metamorphic
Granite
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)
igneous
Mixed rock and mineral collection
Unidentified assortment of geological specimens; individual species cannot be determined from the image
mineral
Limonite pseudo-concretion (Ironstone)
Limonite (FeO(OH)·nH2O) / Goethite
sedimentary
Quartz Pebble
Quartz (Silicon Dioxide - SiO2)
mineral
Limonite Stained Basalt
Hydrated Iron Oxide on Mafic Volcanic Rock (FeO(OH)·nH2O)
igneous
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Fluorite (specifically Blue John or Banded Fluorite)
Calcium Fluoride (CaF2)
mineral
Polished pink feldspar-rich rock, possibly unakite
Likely unakite (epidote, pink potassium feldspar, and quartz); identification is uncertain from the photo
metamorphic
Schist
Mica Schist
metamorphic
Speckled feldspar-rich pebble
Likely leucocratic granite or granitic pegmatite, chiefly potassium feldspar with dark biotite or amphibole
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt (containing quartz/agate or zeolite fill)
igneous
Granite
Intrusive Igneous Rock
igneous
Native Copper
Native Copper (Cu)
mineral
Dark green mineral specimen, possibly serpentine or epidote
Tentatively serpentine-group mineral, Mg₃Si₂O₅(OH)₄, or epidote, Ca₂(Al,Fe)₃Si₃O₁₂(OH)
mineral
Milky Quartz with Mica Matrix
SiO2 (Silicon Dioxide) with Muscovite/Biotite mica
mineral
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
mineral
Greenschist
Chlorite Schist (Greenschist Facies)
metamorphic
Pyrite on Quartz matrix
Iron Disulfide (FeS2) on Silicon Dioxide (SiO2)
mineral