Muscovite Mica
KAl2(AlSi3O10)(F,OH)2
mineral
Category
Metamorphic (Pseudo Igneous)
Browse metamorphic (pseudo igneous) specimens identified by the Rock Identifier community.
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Magnetite / Hematite (Iron Ore)
Magnetite (Fe3O4) or Hematite (Fe2O3)
mineral
Garnet
Group of silicate minerals (e.g., Almandine: Fe3Al2(SiO4)3)
gemstone
Lapis Lazuli
(Na,Ca)8(Al,Si)12O24(S,SO4)(Cl)2
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
gemstone
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Ruby (varieties of Corundum)
Aluminum oxide (Al2O3) with Chromium traces
mineral
Green Gneiss
Metamorphic Gneiss
metamorphic
Conical fossil shell or shell fragment
Likely a gastropod shell fragment; exact taxon indeterminate from the image
fossil
Likely quartz-bearing rock or mineral fragment
Indeterminate; possibly quartz (SiO₂) with iron-oxide staining and darker matrix
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Crystalline Quartz (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Greenstone or Epidote-rich rock
Epidote or Chlorite schist/greenstone
metamorphic
Raw Emerald (Emerald Beryl)
Beryl (Be3Al2Si6O18) with chromium/vanadium impurities
mineral
Almandine Garnet
Fe3Al2(SiO4)3
mineral
Banded Gneiss
Metamorphic Gneiss
metamorphic
Yellow chalcedony or quartz fragment
Microcrystalline quartz, SiO₂ (tentative; possibly iron-stained chalcedony)
mineral
Eclipse Stone (Kabamba Jasper)
Rhyolite with Aegirine (NaFe3+Si2O6)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron sulfide (FeS2)
mineral
Fluorescent Calcite
Calcite (CaCO3)
mineral
Rounded gray pebble, likely quartz-rich stone
Indeterminate; possibly quartzite or a weathered granitic pebble
rock
Onyx (Agate) or Black Spinel/Glass
SiO2 (Silicon dioxide) if onyx/agate
gemstone
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
gemstone
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Biotite (Black Mica)
Biotite - K(Mg,Fe)3(AlSi3O10)(F,OH)2
mineral
Quartz (Raw Specimen)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Pebble)
Silicon Dioxide (SiO2)
mineral
Gravel / Small Pebble
Rock Fragment (Gravel)
sedimentary
Sodalite
Sodalite: Na8(Al6Si6O24)Cl2
mineral