Red Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Category
Mineral (Man Made Composite)
Browse mineral (man made composite) specimens identified by the Rock Identifier community.
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz Geode
Silicon Dioxide (SiO2) within a geode
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Malachite
Copper carbonate hydroxide Cu2CO3(OH)2
mineral
Agate
Silicon dioxide (SiO2)
mineral
Peridot
Olivine (Magnesium Iron Silicate), (Mg, Fe)2SiO4
mineral
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Agate Geode Node
Cryptocrystalline Quartz (SiO2)
mineral
Chrysocolla in Matrix
Hydrated copper phyllosilicate mineral (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Chrysocolla on Matrix
Hydrated copper phyllosilicate mineral (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Rhodonite
Rhodonite (MnSiO3)
Mineral
Amazonite
KAlSi3O8 (Potassium Feldspar, variety of Microcline)
Mineral
Sandstone
Arenite (a specific type of sandstone with less than 15% matrix)
Sedimentary rock
Porphyritic Basalt or Diabase with Plagioclase Phenocrysts
Porphyritic Basalt or Diabase; Mineral: Plagioclase Feldspar
Igneous
Sandstone Concretion
Clastic sedimentary rock (primarily Silica, SiO2, or Calcium Carbonate, CaCO3)
sedimentary
Jasper with Quartz Vein
Silicon Dioxide (SiO2) with impurities
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Granite
Granite
igneous
Turquoise (beads)
Turquoise; CuAl6(PO4)4(OH)8·4H2O
Mineral
Blue Aragonite
Aragonite (Calcium Carbonate, CaCO3)
mineral
Manganese-coated Sandstone
Clastic sedimentary rock with Manganese Oxide (often Pyrolusite or Psilomelane)
sedimentary
Desert Rose
Gypsum (CaSO4·2H2O) or Baryte (BaSO4) with trapped sand grains
mineral
Diamond
Diamond (C)
mineral
Botryoidal Chalcedony (Agate/Carnelian)
Chalcedony (SiO2)
mineral
Greywacke (River Slikenside)
Greywacke (Lithic Sandstone)
sedimentary
Copper Ore
Native Copper (Cu) often found with Chalcocite (Cu2S) or Bornite (Cu5FeS4)
mineral
Black Opal
Amorphous hydrated silica (SiO2 nH2O)
mineral
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Jadeite
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Fluorite (Rainbow Fluorite)
Calcium Fluoride (CaF2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Shale
Shale (Lutite)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
White Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Ferruginous Quartz (Iron-stained Quartz)
Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)
mineral