Kaolinite (Kaolin)
Kaolinite (Al2Si2O5(OH)4)
mineral
Category
Metamorphic And Igneous
Browse metamorphic and igneous specimens identified by the Rock Identifier community.
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Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Yellow variety)
Silicon Dioxide (SiO2)
mineral
Aventurine
Aventurine Quartz (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sunstone
Feldspar (variety Oligoclase or Labradorite), (Ca,Na)(Al,Si)4O8
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Amethyst (Chevron or Banded Amethyst)
Silicon Dioxide (SiO2) with trace Iron (Fe)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Iolite (Cordierite)
Cordierite (Magnesium Aluminum Silicate), Mg2Al4Si5O18
Mineral
Natural freshwater pearls
Pearl (nacreous calcium carbonate; chiefly aragonite, CaCO₃)
gemstone
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Garnet Gneiss
Garnetiferous quartzo-feldspathic gneiss
metamorphic
Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
gemstone
Garnet in Matrix
Almandine or Pyrope Garnet (X3Y2(SiO4)3) in Schist or Eclogite matrix
metamorphic
Gneiss and Igneous Rock Collection
Foliated Metamorphic Rock (Gneiss) / Igneous Rocks
metamorphic
Dumortierite Quartz
Dumortierite (Al7BO3(SiO4)3O3) within Quartz (SiO2)
igneous
Pyrite
Iron Pyrite (FeS₂)
Mineral
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Quartz vein in host rock
Quartz (SiO₂), likely milky quartz; host rock is uncertain from the photo
metamorphic
Milky and Ferruginous Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
White Quartz (Milky Quartz)
Quartz (Silicon Dioxide - SiO2)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Greenschist
Chlorite-actinolite schist
metamorphic
Epidote
Epidote (Ca2(Al, Fe)3(SiO4)3(OH))
mineral
Gneiss
Foliated Metamorphic Rock
metamorphic
Schist
Metamorphic Rock (Schist)
metamorphic
Gneiss
Gneiss (Metamorphic rock)
metamorphic
Magnetite
Magnetite (Iron(II,III) oxide, Fe3O4)
mineral
Pyrite (on the right) and Magnetite or Hematite (on the left)
Iron Sulfide (FeS2) and Iron Oxide (Fe3O4 or Fe2O3)
mineral
Banded Gneiss
Gneiss
metamorphic
Quartzite River Pebble
Metamorphic Quartzite (SiO2)
metamorphic
Basalt Pebble
Aphanitic Mafic Igneous Rock
igneous
Quartz on Chlorite Schist
Chlorite Schist (Mg,Fe)3(Si,Al)4O10(OH)2 with Quartz (SiO2)
metamorphic
Almandine Garnet
Almandine - Fe3Al2(SiO4)3
mineral