Asphalt fragment
Bituminous concrete
anthropogenic material
Category
Industrial Byproduct (Anthropogenic Rock Like Material)
Browse industrial byproduct (anthropogenic rock like material) specimens identified by the Rock Identifier community.
Learn about Industrial Byproduct (Anthropogenic Rock Like Material) in the encyclopedia
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Chert Arrowhead (Projectile Point)
Microcrystalline Quartz (SiO2)
sedimentary
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Sandstone
Arenite (SiO2 primarily)
sedimentary
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
mineral
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Dark rock fragment, possibly basalt
Undetermined; possibly basalt (fine-grained mafic volcanic rock)
igneous
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (Lithic arenite / Quartz arenite)
sedimentary
Basalt (Phaneritic or Diabase)
Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)
igneous
Fossiliferous Limestone with Crinoid Stem fragment
Calcite (CaCO3) containing Crinoidea fossils
sedimentary
Red Sandstone
Sandstone (lithic arenite or arkose with iron oxide)
sedimentary
Polished ocean jasper (orbicular jasper), probable
Silicified orbicular rhyolite; chiefly microcrystalline quartz (SiO₂)
mineral
Basalt (Vesicular/Scoria)
Vesicular Basalt
igneous
Artisanal Glass Beads (Simulated Goldstone or Aventurine Glass)
Silicon Dioxide (SiO2) with metallic inclusions
man-made material
Dendritic jasper/chalcedony
Silica-rich microcrystalline quartz (SiO₂) with manganese-oxide dendrites
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chert (Arrowhead Fragment)
Silicon Dioxide (SiO2)
sedimentary
Greenish Metamorphic Rock (likely containing epidote or chlorite)
Metamorphic rock, possibly epidosite or greenstone
Metamorphic
Mica Schist
Metamorphic Schist
metamorphic
Likely silicon carbide (carborundum)
Synthetic silicon carbide (SiC), likely blue-green crystalline grit
mineral
Red Sandstone
Arenite (SiO2 with Fe2O3)
sedimentary
Unidentified brown stone
Indeterminate from the image; possibly a common iron-stained mineral or rock fragment
mineral
Mother of Pearl (Nacre)
Aragonite (CaCO3) with Organic Matrix
mineral
Laterite (Red Clay)
Laterite (Fe2O3 · nH2O and Al2O3 · nH2O)
sedimentary
Sea Glass
Man-made silicate glass
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Chert Arrowhead (Lithic Artifact)
Microcrystalline Quartz (SiO2)
sedimentary
Basalt
Basalt
igneous
Sandstone
Arenite
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
White quartz geode nodule
Quartz (SiO₂), likely a quartz-lined geode or vug in a host rock
mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Polished kambaba jasper (orbicular rhyolite)
Silicified orbicular rhyolite, commonly sold as kambaba jasper; orbicular patterns may include quartz, feldspar, and amphibole/chlorite minerals
igneous
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Chert (Arrowhead Preform or Point)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Polished brecciated jasper
Silica-rich microcrystalline quartz (SiO₂), likely brecciated jasper with iron-oxide staining
metamorphic
Sandstone (with biological crust)
Arenite (SiO2 based)
sedimentary
Bismuth
Bismuth (Bi)
mineral
Granodiorite
Granodiorite
igneous
Chert (often called Flint or Jasper)
Silicon Dioxide (SiO2)
sedimentary
Schist
Mica Schist
metamorphic