Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Category
Anthropogenic (Man Made Material Mimicking Sedimentary Rock)
Browse anthropogenic (man made material mimicking sedimentary rock) specimens identified by the Rock Identifier community.
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Magnetic Hematite (Man-made)
Iron Oxide (Fe2O3) with Barium-Strontium Ferrite
mineral
Diamond
Carbon (C)
gemstone
Coquina (Fossiliferous Limestone)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Asphalt (Bituminous Concrete)
Asphaltum / Bitumen-Aggregate Matrix
Technonatural composite (often containing sedimentary/igneous aggregate)
Sandstone Concretion
Clastic Sedimentary Concretion (typically Quartz/Silica with Iron Oxide)
sedimentary
Sandstone (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
sedimentary
Flint
Silicon dioxide (SiO2)
sedimentary
Chert (Flint)
SiO2 (Microcrystalline Quartz)
sedimentary
Chert (Chert / Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Synthetic Costume Accessory (Non-Geological)
Polyester and Acrylic Fiber (Anthropogenic polymer)
Synthetic / Man-made textile
Chert Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Slate
Metamorphic Pelitic Rock
metamorphic
Synthetic Resin / Plastic Figurine
Synthetic Polymer (Copolymer of Polyethylene or Resin)
Mineraloid-like Synthetic Material
Chert (Arrowhead/Projectile Point)
Microcrystalline quartz (SiO2)
sedimentary
Moldavite
Tektite (Impact Glass), ~80% SiO2 + Al2O3
tektite
Citrine Quartz
Citrine (Silicon Dioxide, SiO2)
mineral
Polished black stone, likely black obsidian
Obsidian (volcanic glass), chiefly silica-rich rhyolitic composition
igneous
Chert (and Agate/Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Green glass sphere/marble
Soda-lime glass (primarily SiO2, Na2O, CaO)
Man-made object (Simulant)
Carborundum (Silicon Carbide)
Silicon carbide (SiC)
mineral
Sandstone
Arenite (siliciclastic sedimentary rock composed mostly of quartz)
sedimentary
Sandstone
Arenite
sedimentary
Opalite
Man-made glass (traditionally simulated Opal)
mineral
Possible tektite or iron-rich slag-like natural specimen
Uncertain; possibly natural glass (tektite) or magnetite-rich rock
mineral
Asphalt Pavement (with aggregate)
Asphalt concrete
man-made composite
Carborundum (Silicon Carbide)
Silicon Carbide (SiC) / Moissanite (natural form)
mineral
Red Sandstone
Arenite (Fe2O3 enriched)
sedimentary
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Opalite
Synthetic Opalite Glass
mineraloid (man-made)
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
mineral (synthetic)
Cullet (Slag Glass)
Amorphous Silica (Industrial byproduct)
mineraloid
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Blue Impression Jasper beads
Impression jasper (microcrystalline quartz/chalcedony), chiefly SiO₂, with iron-oxide and other mineral inclusions
gemstone
Sandstone
Arenite
sedimentary
Green Sea Glass
Man-made silicate glass (weathered)
sedimentary
Opalite
Man-made opalescent glass (SiO2 + metal oxides)
mineral (synthetic)
Chalk
Carbonate rock (mainly CaCO3)
sedimentary
Pink Cubic Zirconia (CZ)
Zirconium Dioxide (ZrO2)
mineral (synthetic)
Opalite
Man-made Glass (Synthetic Opalized Glass)
gemstone
Dyed Imperial Jasper (Sea Sediment Jasper)
Silicon Dioxide (SiO2) - Impure Quartz/Chalcedony
sedimentary
Chert (Flint)
Microcrystalline quartz (SiO2)
sedimentary