Quartz
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary Or Metamorphic (Low Grade)
Browse sedimentary or metamorphic (low grade) specimens identified by the Rock Identifier community.
Learn about Sedimentary Or Metamorphic (Low Grade) in the encyclopedia
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Basalt Pebble
Extrusive Igneous Rock
igneous
Cat's Eye Moonstone (Simulated/Synthetic or natural Cat's Eye Quartz/Glass)
There is no single scientific name. The appearance suggests either: Moonstone (feldspar group), Cat's Eye Quartz (SiO2), Apatite (Ca5(PO4)3(F,Cl,OH)), or most likely a synthetic material such as Fiber Optic Glass or 'Opalite' (a type of glass).
Mineral
Emerald in Host Rock
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Schist
Mica Schist (primarily consisting of muscovite, biotite, and quartz)
metamorphic
Greenschist
Greenschist (chlorite schist)
metamorphic
Sugilite
Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)
mineral
Pearl (in a decorative hair comb setting)
Calcium carbonate (CaCO3) primarily as Aragonite, bonded with Conchiolin
Organic Mineraloid
Magnetite
Magnetite (Fe3O4)
mineral
Shale / Mudstone
Sedimentary rock (Claystone / Mudstone / Shale)
sedimentary
Schist
Schist (Crystalline Metamorphic Rock)
metamorphic
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Pyrite
Iron Disulfide (FeS2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Muscovite Mica
Muscovite: KAl2(AlSi3O10)(OH)2
mineral
Banded Gneiss with Quartz Veining
Gneiss (High-grade Regional Metamorphism)
metamorphic
Schist
Mica Schist
metamorphic
Schist
Mica Schist (primarily composed of quartz, feldspar, and mica)
metamorphic
Mica Schist
Muscovite/Biotite Schist
metamorphic
Quartz Vein / Quartzite with Iron Oxide Staining
Silicon Dioxide (SiO2)
mineral
Basalt with Quartz/Calcite Vein
Aphanitic Mafic Volcanic Rock with Quartz (SiO2) or Calcite (CaCO3) Vein
igneous
Raw green aventurine (likely quartzite)
Quartz-rich quartzite, chiefly microcrystalline SiO₂ with green mica/fuchsite or chlorite
metamorphic
Serpentinite
Serpentinite (complex silicate mineral group (Mg,Fe)3Si2O5(OH)4)
metamorphic
Schist
Mica Schist
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Serpentinite
Serpentinite (composed primarily of mineral group (Mg,Fe,Ni,Al)3Si2O5(OH)4)
metamorphic
Tumbled Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Milky Quartz with Mineral Inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Mica Schist
Mica Schist
metamorphic
Beach Pebble (Quartzite / Sandstone)
Quartz-rich sedimentary or metamorphic rock pebble
sedimentary
Iolite (Cordierite)
Cordierite (Mg2Al4Si5O18)
gemstone
Microcline Feldspar
KAlSi3O8
mineral
Beryl (Emerald Variety)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Granite Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Citrine
Silicon Dioxide (Quartz variety), SiO2
mineral
Serpentine
Serpentine group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al)2O5(OH)4)
metamorphic
Infinite Stone
Serpentine with Chrysotile (Mg3(Si2O5)(OH)4)
metamorphic
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
gemstone
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Green Quartzite
Quartzite (SiO2 with chromium-rich muscovite/fuchsite inclusions)
metamorphic