Chert (varietal Chalcedony or Flint)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Category
Anthropogenic (Man Made Material)
Browse anthropogenic (man made material) specimens identified by the Rock Identifier community.
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Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite (variable SiO2 composition)
sedimentary
Diorite (Gneissic)
Diorite
igneous
Chert (Arrowhead/Projectile Point)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Obsidian Arrowhead
Obsidian (Volcanic Glass)
igneous
Painted River Rock
Anthropogenic-modified Siliciclastic Sedimentary Rock
Sedimentary
Sea Glass
Amorphous Silica (Anthropogenic glass) - SiO2
mineral
Diamond
Carbon (C)
gemstone
Pink Granite
Phaneritic Felsic Igneous Rock (composed of orthoclase, quartz, and plagioclase)
igneous
Chert (Flint)
Chert (SiO2)
sedimentary
Iron-stained quartz-rich rock, possibly jasper or chert
Microcrystalline quartz (SiO₂) with iron oxides/hydroxides
mineral
Chalcedony (Agate / Jasper Specimen)
Silicon Dioxide (SiO2)
mineral
Coquina
Biogenic Limestone (Coquina)
sedimentary
Fossilized Shark Tooth (Eroded)
Carcharodon sp. or Otodus sp. fragment (likely)
fossil
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 based clastic rock)
sedimentary
Chalk
Calcium carbonate (CaCO3)
sedimentary
Diamond
Carbon (C)
gemstone
Flint
Silicon dioxide (SiO2)
sedimentary
Chert
Microcrystalline Silicon Dioxide (SiO2)
sedimentary
Quartz (Microcrystalline/Chert)
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Silicon dioxide (SiO2)
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Conglomerate (Asphaltic/Anthropogenic)
Clastic sedimentary rock / Bituminous mixture
sedimentary
Sandstone (with iron staining)
Quartz Arenite / Ferruginous Sandstone
sedimentary
Sandstone (likely Quartzose Sandstone)
Arenite
sedimentary
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Chert (Nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Tektite
Natural impact glass
meteorite
Coquina
Coquina (Biogenic Limestone / CaCO3)
sedimentary
Chert (often called Flint or Jasper if reddish)
Microcrystalline Quartz (SiO2)
sedimentary
Goldstone (Synthetic Aventurescence Glass)
Cuprous Aventurescent Glass (Silicon Dioxide with Copper inclusions)
mineraloid / man-made material
Sandstone
Clastic sedimentary rock (Quartz arenite/Arkose)
sedimentary
Jasper (Iron-rich Chalcedony)
Jasper (Microcrystalline Silicon Dioxide, SiO2 plus iron oxide impurities)
Sedimentary / Metamorphic
Chert (with nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Sand Tiger Shark Tooth (Fossil)
Carcharias taurus (fossilized dentin/enameloid)
fossil
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary