Ruby (Cabochon)
Corundum (Al2O3)
gemstone
Category
Metamorphic (Pseudo Igneous)
Browse metamorphic (pseudo igneous) specimens identified by the Rock Identifier community.
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Graphite
Graphite (C)
mineral
Weathered schist or gneiss fragment
Quartz–feldspar–mica metamorphic rock; likely mica schist or gneiss
metamorphic
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Magnetite / Hematite mix (Iron Ore)
Fe3O4 (Magnetite) / Fe2O3 (Hematite)
mineral
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
mineral
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Labradorite
(Ca,Na)(Al,Si)4O8 (Plagioclase Feldspar)
mineral
Agate
Chalcedony (SiO2)
sedimentary
Microcline Feldspar
KAlSi3O8
mineral
White Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite or Chalcopyrite specimen (Gold-colored mineral coating)
Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)
mineral
White Quartz Beads
Silicon Dioxide (SiO2)
mineral
Black Tourmaline (Schorl)
NaFe2+3Al6(BO3)3Si6O18(OH)4
mineral
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(F,OH)2
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Tourmaline in Quartz Matrix
Complex silicate of boron and aluminum (Schorl/Elbaite/Dravite) - Na(Li,Al)3Al6(BO3)3Si6O18(OH)4
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Iolite
Cordierite (Mg2Al3(AlSi5O18))
gemstone
Sunstone Quartz / Aventurine Quartz
Silicon Dioxide (SiO2) with inclusions
mineral
Quartz pebble
SiO2
mineral
Tumbled Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Quartz (Pink/Rose Quartz or Quartz Crystal)
Silicon Dioxide (SiO2)
mineral
Black Tourmaline
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)
mineral
White Quartz
Silicon Dioxide (SiO2)
mineral
Iceland Spar (Optical Calcite)
Calcite (CaCO3)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
gemstone
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
mineral
Quartz
Silicon dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral