Jasper
Silicon Dioxide (SiO2)
sedimentary
Category
Man Made Material (Metal)
Browse man made material (metal) specimens identified by the Rock Identifier community.
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Diamond
Carbon (C)
gemstone
Quartzite
Quartzite (SiO2)
metamorphic
Chert (specifically Red Chert or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (often called Flint)
Chert (SiO2)
sedimentary
Bauxite
Bauxite (mixture of Gibbiste Al(OH)3, Boehmite ̳-AlO(OH), and Diaspore ́-AlO(OH))
sedimentary
Diamond
Native Carbon (C)
gemstone
Sandstone
Arenite
sedimentary
Green Slag Glass
Cullet (Amorphous Silicon Dioxide with impurities)
Man-made rock-like material
Turquoise cabochon jewelry
Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O
gemstone
Graphite
Graphite (Carbon, C)
mineral
Chert / Flint
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Synthetic Faux Fur Fursuit
Polyacrylonitrile / Polyester (Synthetic Textile)
not a rock (synthetic material/costume)
Sandstone (Pebble)
Sandstone (arenite, arkose, wacke depending on composition)
sedimentary
Ironstone Matrix with Jasper / Chert
Ferruginous Chert / Limonitic Jasper (SiO2 with Fe-oxides)
sedimentary
Coquina / Fossiliferous Limestone
Coquina (composed primarily of Calcium Carbonate / CaCO3)
sedimentary
Quartz with Chlorite / Greenschist
Quartz vein in Greenschist (SiO2 with Chlorite group minerals)
metamorphic
Gold Ore
Native Gold (Au) in Matrix
mineral
Fossilized oyster shell
Bivalvia; likely an oyster (Ostreidae), partly mineralized with calcite
fossil
Natural or Cultured Pearl
Calcium Carbonate (Aragonite and Conchiolin), CaCO3
Mineral (Organic)
Chipped Glass/Plastic Fragment
Silicon dioxide (SiO2) for glass (amorphous) or various polymer compounds for plastic
Man-made material (simulant/artifact)
Ferrochrome Slag
Industrial Glassy Slag (Fe-Cr alloy byproduct)
Antropogenic (Man-made industrial byproduct)
Quartzite (Yellow/Tan)
Metamorphic Rock composed of Quartz (SiO₂)
metamorphic
Pyrite in Gossan
Iron Sulfide (FeS2) in Ferruginous Rock
mineral
Pyrite in Quartz
Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)
mineral
Chert (often called Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (Red/Brown Variety)
Arenite (composed primarily of SiO2 with Fe2O3 iron oxide inclusions)
sedimentary
Man-made Green Quartz (Lab-grown or Treated)
Silicon Dioxide (SiO2) with artificial coloration
mineral
White Marble
Recrystallized Calcite Rock (CaCO3)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Chert / Green Jasper
Silicon Dioxide (SiO2)
sedimentary
Diorite (River Pebble)
Intermediate Phaneritic Igneous Rock
igneous
Pyrite
Iron Sulfide (FeS2)
mineral
Diamond (Faceted)
Carbon (C)
gemstone
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
metamorphic
Blue glass-like tumbled specimen
Most likely cobalt-blue slag glass or manufactured glass; not confidently identifiable as a natural mineral from the image
mineral
Limonitic Gossan
Goethite/Limonite aggregate after sulfide
igneous and metamorphic derivative (weathered)
Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Arrowhead Shard)
Microcrystalline silica (SiO2)
sedimentary