Gold Nugget
Native Gold (Au)
Category
Browse anthropogenic (man made industrial deposit) specimens identified by the Rock Identifier community.
Gold Nugget
Native Gold (Au)
Red Jasper (Quartzite conglomerate)
Silicon dioxide (SiO2) with Iron inclusions
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
Hematite
Iron(III) oxide (Fe2O3)
Bornite
Bornite (Cu5FeS4)
Sandstone
Arenite (SiO2 based)
Sandstone (likely Arkosic or Quartzose)
Sandstone (SiO2 dominated)
Biotite Mica
K(Mg, Fe)3AlSi3O10(F, OH)2
Sandstone (Quartz Arenite)
Sandstone (Chemical formula: primarily SiO2)
Sandstone (Quartzose Sandstone)
Arenite (SiO2 primarily)
Sandstone (with Iron Staining)
Clastic sedimentary rock (SiO2 with Fe2O3 impurities)
Sandstone
Arenite (primarily SiO2)
Pyrite (Fool's Gold) in Matrix
Iron Sulfide (FeS2)
Limonite with Iron Inclusions
Limonite (Hydrated Iron Oxide, FeO(OH)·nH2O)
Limonite (Yellow Ochre)
Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Arenite
Shale
Fissile Mudrock (Clay-rich Sedimentary Rock)
Rhodonite
Rhodonite (Manganese silicate, (Mn,Fe,Mg,Ca)SiO3)
Sand (Construction Grade)
Unconsolidated siliciclastic sediment (primarily SiO2)
Chalk (Sedimentary Limestone)
Calcium Carbonate (CaCO3) - Bioclastic Limestone
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Siltstone or Mudstone
Argillaceous sedimentary rock
Fluorite
Fluoride (Calcium Fluoride - CaF2)
Green Calcite (Onyx Marble)
Calcium Carbonate (CaCO3)
Smoky Quartz
Silicon Dioxide (SiO2)
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Rhodonite
Manganese Silicate (Mn, Fe, Mg, Ca)SiO3
River Stone (Chert/Siltstone)
Cryptocrystalline Quartz (SiO2) with trace impurities
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Sandstone, Quartzite, and River Pebbles
Silicon Dioxide (SiO2) based Sedimentary/Metamorphic structures
Quartzite
Quartzite (mainly SiO2)
Orange Quartzite / Quartz River Siltstone
Quartzite (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Rhodochrosite
Manganese Carbonate (MnCO3)
Quartzite River Stone
Quartzite (primarily SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Quartzite River Rock
Quartzite (Silicon Dioxide, SiO2)
Chert / Jasper
Microcrystalline Quartz (SiO2)
Travertine (Ceramic Tile)
Terrestrial Sedimentary Rock / Calcium Carbonate (CaCO3)
Grey Chalcedony (Agate)
Silicon Dioxide (SiO2)
Sandstone
Arenite (SiO2 based)