Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Igneous, Sedimentary, Metamorphic
Browse igneous, sedimentary, metamorphic specimens identified by the Rock Identifier community.
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Muscovite Mica
Muscovite - KAl2(AlSi3O10)(F,OH)2
mineral
Sodalite and Calcite
Na8(Al6Si6O24)Cl2 (Sodalite) and CaCO3 (Calcite)
mineral
Muscovite on Quartz (Mica host rock)
KAl2(AlSi3O10)(OH)2 (Muscovite) in SiO2 (Quartz)
igneous/metamorphic
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities
mineral
Quartz (Yellow/Citrine variety)
Crystalline Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Peach Moonstone
Orthoclase Feldspar (KAlSi3O8)
mineral
Sodalite
Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Sapphire (Rough Corundum)
Corundum (Aluminum Oxide, Al2O3)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Citrine Quartz Sphere
Silicon Dioxide (SiO2)
mineral
Blue Sapphire
Corundum (Al2O3)
mineral
Ruby (set in a gold pendant)
Ruby (Variety of Corundum, Al2O3)
mineral
River Pebbles and Quartz
Mixed Igneous, Sedimentary, and Metamorphic Rocks (Silicon Dioxide SiO2 dominant)
mixed
Kyanite
Kyanite (Al2SiO5)
Mineral
Milky Quartz with Iron Oxide Weathering
Silicon Dioxide (SiO2) with Goethite/Limonite coatings
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Iron-stained or Ferruginous)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Epidote (with Quartz and Feldspar)
Epidote (unakalite/unite), Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Apatite
Apatite Group (e.g., Fluorapatite Ca5(PO4)3F, Chlorapatite Ca5(PO4)3Cl, Hydroxylapatite Ca5(PO4)3(OH))
mineral
Rock Crystal Quartz
Quartz (SiO₂)
Mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Fluorite, Turquoise, and Calcite set
Calcium Fluoride (CaF2), Hydrous Phosphate of Copper and Aluminum (CuAl6(PO4)4(OH)8·4H2O), Calcium Carbonate (CaCO3)
mineral
Quartz (Smoky Quartz / Calcite)
SiO2 (Silicon Dioxide)
mineral
Tiger's Eye, Hematite, and Black Obsidian Bracelet
SiO2 (Tiger's Eye), Fe2O3 (Hematite), and 70-75% SiO2 (Obsidian)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Garnet (likely Almandine, Pyrope, or a blend)
Garnet group minerals: X3Y2(SiO4)3, where X and Y represent various metal ions (e.g., Almandine: Fe3Al2(SiO4)3, Pyrope: Mg3Al2(SiO4)3)
Mineral
Banded River Rock / Gneiss (highly weathered)
Gneiss
Metamorphic rock
Greenschist
Greenschist (containing Chlorite, Epidote, and Actinolite)
metamorphic
Epidote in Matrix (Unakite-like Rock Fragment)
Epidote (Ca2(Al,Fe)3(SiO4)3(OH)) / Altered Metamorphic Pebble
metamorphic
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Epidote (likely Unakite component or Epidosite)
Epidote (Ca2(Al2Fe)(SiO4)(Si2O7)O(OH))
metamorphic
Muscovite Mica
KAl2(AlSi3O10)(F,OH)2
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Dalmatian Stone
Peralkaline rhyolite
igneous