Quartz Pebble
Silicon Dioxide (SiO2)
Category
Browse mineral on igneous rock specimens identified by the Rock Identifier community.
Quartz Pebble
Silicon Dioxide (SiO2)
Unakite
Unakite (Metasomatized Granite)
Quartz Pebble
Silicon Dioxide (SiO2)
Amethyst
Amethyst (Silicon Dioxide, SiO2)
Magnetite
Magnetite (Fe3O4)
Fish Fossil in Limestone
Lycoptera (likely) in Micritic Limestone
Spessartine Garnet
Manganese aluminum silicate (Mn2+3Al2(SiO4)3)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Sandstone (Ferruginous)
Arenite (Fe2O3 staining)
Marble
Metamorphosed Limestone/Dolomite
Quartz Geode
Crystalline Silicon Dioxide (SiO2) within a nodule
Moonstone
Orthoclase (KAlSi3O8) with inclusions of Albite (NaAlSi3O8)
Sandstone
Arenite (SiO2 based with quartz grains)
Clear Quartz
Crystalline Silicon Dioxide (SiO2)
Sandstone
Arenite (SiO2 based)
Sandstone (Ferruginous)
Sandstone (primarily SiO2 with Fe2O3 cement)
Sandstone
Arenite (Clastic Sedimentary Rock)
Rutilated Quartz (likely Citrine or Smoky Quartz with Rutile inclusions)
SiO2 with TiO2 inclusions (Quartz with Rutile)
Jasper
Jasper (Silicon Dioxide, SiO2)
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
Iron-stained Quartz (Gossan/Limonite-coated Quartz)
Silicon Dioxide (SiO2) with Hydrated Iron Oxides (FeO(OH)·nH2O)
White Marble
Recrystallized Calcite (CaCO3)
Yellow Calcite
Calcium Carbonate (CaCO3)
Quartz Pebble
Silicon Dioxide (SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Orange Calcite
Calcium Carbonate (CaCO3)
Orange Calcite and White Calcite
Calcium Carbonate (CaCO3)
Hypersthene
Hypersthene (Magnesium Iron Silicate - (Mg,Fe)SiO3)
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Sodalite
Na8(Al6Si6O24)Cl2
Lapis Lazuli
Complex rock primarily containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2
Quartz / Quartzite
Quartz (Silicon Dioxide, SiO2)
Man-made Synthetic Material (Plastic/Composite)
Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)
Diopside (likely Chromian Diopside)
Diopside, part of Clinopyroxene family of inosilicates. Chemical formula: CaMgSi2O6. The green variety is often Chromian Diopside due to chromium impurities.
Orthoclase Feldspar (Sunstone variety)
KAlSi3O8 (Potassium Aluminum Silicate)
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Chipped Glass/Plastic Fragment
Silicon dioxide (SiO2) for glass (amorphous) or various polymer compounds for plastic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Diorite (Salt and Pepper Rock)
Diorite