Sandstone
Sedimentary Rock (Quartz Sandstone)
Category
Browse anthropogenic (human made) sedimentary like material specimens identified by the Rock Identifier community.
Sandstone
Sedimentary Rock (Quartz Sandstone)
Sandstone
Arenite (composed primarily of SiO2)
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Fossilized Shark Tooth (Eroded)
Carcharodon sp. or Otodus sp. fragment (likely)
Flint
SiO2 (Cryptocrystalline Quartz)
Chert (variations include Flint/Jasper)
Cryptocrystalline Quartz (SiO2)
Petrified Wood
Silicified Wood (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (Chocolate or Brown Flint)
Chert (SiO2)
Quartz (Microcrystalline/Chert)
Silicon Dioxide (SiO2)
Chert (varieties include Flint and Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Orgonite Pyramid (containing Amethyst and mixed minerals)
Silicon Dioxide (SiO2) in synthetic resin
Chert / Jasper
Silicon Dioxide (SiO₂)
Chert (Red Jasper variant)
Microcrystalline Quartz (SiO2)
Conglomerate
Conglomerate (Sedimentary rock containing rounded clasts)
Chert (Flint)
Silicon Dioxide (SiO2)
Chalcedony (Agate / Jasper Specimen)
Silicon Dioxide (SiO2)
Chert (Flint)
Microcrystalline Silica (SiO2)
Chert (Chert Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Sandstone (likely Quartzose Sandstone)
Arenite
Sandstone (Quartzose)
Sandstone (SiO2 dominated)
Slag (Industrial By-product)
Glassy silicate or metallic smelting residue
Chert (Lithic flake / Arrowhead fragment)
Microcrystalline Quartz (SiO2)
Chert (Jasper/Flint variant)
Microcrystalline Quartz (SiO2)
Chert (Flint)
Chert (Cryptocrystalline Quartz, SiO2)
Chert (Yellow Jasper)
Cryptocrystalline Quartz (SiO2)
Chert (Flint)
Chert (SiO2)
Chert (and Flint)
Silicon dioxide (SiO2) - Microcrystalline quartz
Chert (varieties include Flint and Jasper)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Banded Chert / Chalcedony
Silicon Dioxide (SiO2)
Turquoise
Turquoise (CuAl6(PO4)4(OH)8·4H2O)
Synthetic Costume Accessory (Non-Geological)
Polyester and Acrylic Fiber (Anthropogenic polymer)
Chert / Flint
Silicon Dioxide (SiO₂)
Dark gray rounded stone, possibly basalt or slag
Uncertain; likely fine-grained basalt (plagioclase–pyroxene) or iron-rich industrial slag
Chert
Chert (SiO2)
Chert (and Limestone)
Silicon Dioxide (SiO2)
Iron Slag
Iron/Steel Slag (Ferrosilicate Glass)
Sandstone
Arenite
Chert (Flinty variety)
Microcrystalline Quartz (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Sandstone (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
Beads (likely glass or man-made material)
N/A (artificial material)