Snowflake Obsidian
Volcanic Glass (SiO2 rich with Cristobalite inclusions)
Category
Browse mineral (extraterrestrial) specimens identified by the Rock Identifier community.
Snowflake Obsidian
Volcanic Glass (SiO2 rich with Cristobalite inclusions)
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
Petrified Wood
Silicified wood (SiO2)
Quartzite (with mineral vein)
Metamorphosed Quartz-rich Sandstone (SiO2)
Chrysocolla
Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O
Wulfenite
Lead Molybdate, PbMoO4
Geode
Quartz / Chalcedony nodule
Vanadinite
Vanadinite (Pb5(VO4)3Cl)
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrated copper aluminum phosphate)
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2) with Hematite/Limonite
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Turquoise or Chrysocolla (Inlaid Jewelry)
Hydrated copper aluminum phosphate / Hydrated copper phyllosilicate
Ironstone (likely Limonite or Goethite nodule)
Hydrothermally altered Ferric Hydroxide (FeO(OH)·nH2O)
Limonite with Hematite
Limonite (FeO(OH)·nH2O) and Hematite (Fe2O3)
Ironstone Concretions (Ironstone)
Ferruginous Sandstone or Siltstone (Fe2O3)
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Limonite (Gossan)
FeO(OH)·nH2O (Hydrated Iron Oxide)
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Malachite
Copper carbonate hydroxide [Cu2CO3(OH)2]
Turquoise
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
Green Moonstone (Garnierite)
Nickel-bearing Magnesium Silicate (often a mix of Serpentine and Talc/Chlorite groups)
Pyrite in Matrix
Iron Sulfide (FeS2)
Fossilized Shark Tooth
Carcharodon (Galeocerdo sp. or Lamniform)
Kidney Stone
Nephrolith (typically Calcium Oxalate - CaC2O4)
Green Fluorite
Calcium Fluoride (CaF2)
Schist
Mica Schist
Schist
Mica Schist (Metamorphic rock)
Polished Mexican “Crazy Lace” agate tower
Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide inclusions
Quartz with Feldspar Veining
Silica (SiO2) with Potassium Feldspar (KAlSi3O8) inclusions
Fluorite on Matrix
Calcium Fluoride (CaF2)
Milky Quartz
Silicon Dioxide (SiO2)
Raw Fluorite
Calcium Fluoride (CaF2)
Fluorite
Calcium Fluoride (CaF2)
Quartz (specifically Clear and Rose Quartz)
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz-rich mineral fragment
Quartz (silicon dioxide, SiO₂), possibly milky quartz
Geode
Quartz / Chalcedony nodule with mineralized cavity
Goethite/Hematite Nodule
Goethite (FeO(OH)) and Hematite (Fe2O3)
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)
Limonite (often after Hematite or Goethite)
Limonite (FeO(OH)·nH2O)