Pyrite
Iron Sulfide (FeS2)
mineral
Category
Industrial Byproduct (Anthropogenic Material)
Browse industrial byproduct (anthropogenic material) specimens identified by the Rock Identifier community.
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Textile (Upholstery Fabric)
Woven Polyethylene/Polyester or Cotton Blend
Synthetic or Natural Fiber
Diamond
Native Carbon (C)
mineral
Diamond (in a gold ring)
Diamond (pure carbon, C)
mineral
Polished brecciated jasper or iron-rich agate
Microcrystalline quartz (SiO₂), with hematite/goethite and possible iron oxides
mineral
Asphalt Concrete
Bituminous Concrete
sedimentary (artificial)
Diamond (or Cubic Zirconia)
Cubic Carbon (C) or Zirconium Dioxide (ZrO2)
gemstone
Cobalt Blue Sea Glass
Amorphous Silica Glass (SiO2 + CoO)
mineraloid / anthropogenic material
Serpentine
Serpentine group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al)2O5(OH)4)
metamorphic
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Basalt (Phaneritic or Diabase)
Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)
igneous
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (mostly SiO2)
metamorphic
Basalt
Basalt (Ma-Fe Silicate)
igneous
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt
Basalt (Aphanitic Mafic Volcanic Rock)
igneous
Granodiorite
Granodiorite (Na,Ca)(Al,Si)4O8
igneous
Quartzite
Quartzite (SiO2)
metamorphic
Basalt
Basalt
igneous
Basalt (Vesicular/Scoria)
Vesicular Basalt
igneous
Quartzite
Quartzite (SiO2)
metamorphic
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Weathered stone nodule or concretion
Unidentified lithic concretion; composition cannot be determined from the image
sedimentary
Vesicular iron-rich slag or weathered metallic ore
Indeterminate; likely Fe-oxide-bearing slag (magnetite/hematite) rather than a specific natural mineral
mineral
Polished ocean jasper (orbicular jasper)
Microcrystalline quartz/chalcedony with iron- and manganese-bearing inclusions; SiO₂
mineral
Diamond
C (Carbon)
gemstone
Weathered quartz-rich rock or fossil fragment
Indeterminate; likely quartz-bearing sandstone or siliceous fossil material
mineral
Polished botryoidal jasper/chalcedony (likely ocean jasper)
Microcrystalline quartz, SiO₂, with iron-oxide and other mineral inclusions
mineral
Dalmatian jasper
Quartz-bearing alkali feldspar syenite/porphyritic igneous rock, commonly marketed as Dalmatian jasper
igneous
Diamond
C
gemstone
Blue-gray stone pebble (possibly slag or a weathered rock)
Unidentified fine-grained rock; composition cannot be determined from the image
igneous
Blue Cat's Eye Quartz (Heated/Dyed)
Silicon Dioxide (SiO2) with fibrous inclusions
mineral
Black-and-white bicolored pebble
Likely basalt with a pale felsic or carbonate coating/inclusion; exact identification requires testing
igneous
Possible polished or tumbled stone
Unidentified; the image does not show enough detail to determine its composition
mineral
Weathered quartz-bearing rock, possibly calcite vein fragment
Indeterminate; likely quartz (SiO₂) with carbonate minerals such as calcite (CaCO₃)
mineral
N/A - Image is non-geological
Acrylonitrile Butadiene Styrene (ABS) or Polypropylene (PP)
Synthetic material (Plastic/Polymer)
Polished Ocean Jasper beads
Orbicular jasper (microcrystalline quartz, SiO₂), commonly sold as ocean jasper
mineral
Polished tektite (likely indochinite)
Natural silica-rich impact glass; mainly SiO₂ with Al₂O₃, FeO, MgO, CaO, and Na₂O
mineral
Quartz pebble with iron staining
Silicon dioxide (SiO2) with iron oxide impurities
mineral
Sandstone
Arenite (composed mainly of SiO2)
sedimentary
Sandstone (Iron-stained)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone (Quartz-rich)
Arenite (primarily SiO2)
sedimentary