Green Banded Chert (Agate/Jasper)
Silicon Dioxide (SiO2) with trace impurities of Chlorite or Glauconite
Category
Browse anthropogenic (man made industrial deposit) specimens identified by the Rock Identifier community.
Green Banded Chert (Agate/Jasper)
Silicon Dioxide (SiO2) with trace impurities of Chlorite or Glauconite
Sodalite
Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
Rough Corundum (likely Sapphire or Common Corundum)
Aluminum oxide (Al2O3)
Geode (Unopened)
Quartz Geode (SiO2) / Chalcedony Concretion
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
Pearl (Biogenic)
Nacre / Calcium Carbonate (CaCO3)
Kaolin (China Clay)
Kaolinite [Al2Si2O5(OH)4]
Asphalt
Asphalt concrete (engineered material, not a naturally occurring rock/mineral in this form)
Sandstone
Arenite (siliciclastic sedimentary rock composed mostly of quartz)
Sandstone
Sandstone (Quartz-rich Arenite / SiO2)
Coquina
Bioclastic Limestone (Calcium Carbonate, CaCO3)
Chert (Jasper/Agate variety)
Silicon Dioxide (SiO2)
Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color)
Calcite
Ruby
Corundum (mineral species), variety: Ruby (Al2O3 with Cr3+ as the chromophore)
Titanium Coated Aura Quartz (Apple Aura Quartz)
Silicon Dioxide (SiO2) with Metallic Vapor Deposition Coating
Chert
Microcrystalline quartz (SiO2)
Quartz Vein in Metamorphic Rock
Silicon Dioxide (SiO2) within Metasedimentary host
Malachite
Malachite (Copper Carbonate Hydroxide) - Cu2CO3(OH)2
Flint
Silicon Dioxide (SiO2) - Microcrystalline Quartz / Chert
Tree Agate
Chalcedony (SiO2)
Rough Diamond
Diamond (Pure Carbon: C)
Hand-Drawn Trading Card (Amateur Artwork)
Cellulose-based substrate with wax/graphite/ink deposit (n/a for minerals)
Sandstone
Sedimentary Rock (Quartz Sandstone)
Flint / Chert
Microcrystalline Quartz (SiO2)
Coquina / Fossiliferous Limestone
Coquina (composed primarily of Calcium Carbonate / CaCO3)
Petrified Wood
Silicified Wood (SiO2)
Diamond
C (Carbon)
Lapis Lazuli
Lapis Lazuli (a rock, not a single mineral; primary mineral is Lazurite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2
Tumbled purple quartz, likely amethyst or lavender quartz
Quartz (SiO₂), probably iron-colored amethyst; exact variety uncertain from the image
Natural or Cultured Pearl
Calcium Carbonate (Aragonite and Conchiolin), CaCO3
Pyrite
Iron Sulfide (FeS2)
Pyrite
Iron Sulfide (FeS2)
Chert Pebble
Chert (Microcrystalline Quartz, SiO2)
Amethyst Quartz
SiO2 (Silicon Dioxide)
Sandstone
Clastic Sedimentary Rock
Blue opalite (often sold as synthetic opal)
Opalite glass; amorphous hydrated silica if natural opal (SiO₂·nH₂O)
Bauxite
Bauxite (Al(OH)3, AlO(OH))
Pyrite
Iron Sulfide (FeS2)
Chrysocolla in Malachite
Cu2CO3(OH)2 (Malachite) / Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla)
Ironstone (possibly Bog Iron or Limonite)
Goethite-rich Ironstone (FeO(OH))
Coquina
Coquina (Biogenic Limestone / CaCO3)