Raw quartz crystal
Quartz (silicon dioxide, SiO₂), likely milky or included quartz
mineral
Category
Anthropogenic Material (Man Made Sedimentary Mimic)
Browse anthropogenic material (man made sedimentary mimic) specimens identified by the Rock Identifier community.
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Chert (Flint)
SiO2 (Microcrystalline Quartz)
sedimentary
Sandstone
Arenite
sedimentary
Blue goldstone beads
Man-made aventurine glass (silica glass with metallic copper inclusions), not natural lapis lazuli
mineral
Concrete or asphalt-like aggregate surface with a dark fragment
Uncertain; likely artificial concrete containing mixed lithic aggregate, not a natural rock
sedimentary
Blue Goldstone
Synthetic glass with copper or cobalt/manganese inclusions
man-made glass
Chert (often called Flint or Jasper if reddish)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint/Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Chalcedony (Agate / Jasper Specimen)
Silicon Dioxide (SiO2)
mineral
Sandstone
Sandstone (composed predominantly of Quartz, SiO2, with Feldspar and Clay minerals)
sedimentary
Chert Arrowhead
Chert (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Chert (Common Opal/Jasper variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (and/or Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Conglomeratic concrete or asphalt aggregate surface with dark bituminous chunks
Polymictic gravel aggregate; dark pieces likely bitumen/asphalt, not a natural rock
sedimentary
Chert (Green Chert or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Aventurine
Quartz containing inclusions of Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Cubic Zirconia (Man-made)
Cubic Zirconia (ZrO2) with Enamel and Metal Alloy
mineral
Red Sandstone
Arenite (Fe2O3 enriched)
sedimentary
Synthetic Zinc/Polycarbonate Composite (Bey-specimen)
Zinc Alloy (Zamak 3) with Polycarbonate (C15H16O2)n Overlay
Anthropogenic Mineral Mimic
Sandstone (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
sedimentary
Sandstone (Wonderstone)
Silicified Sandstone / Orthoquartzite with Liesegang rings
sedimentary
Fossilized Shark Tooth (Eroded)
Carcharodon sp. or Otodus sp. fragment (likely)
fossil
Chert (Flint)
Chert (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (varietal Chalcedony or Flint)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Arrowhead Debitage or Flake)
Microcrystalline silica (SiO2)
sedimentary
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Sandstone (specifically Picture Sandstone or Wonderstone)
Arenite (composed primarily of SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Chalcedony Rose
Silicon Dioxide (SiO2)
mineral
Quartz (Microcrystalline/Chert)
Silicon Dioxide (SiO2)
mineral
Chert
Microcrystalline Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Silicon dioxide (SiO2)
sedimentary
Chert (specifically a Lithic Flake)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Leopard Skin Jasper
Jasper (Silicon Dioxide with impurities), SiO2
sedimentary
Man-made Jewelry (Metal and Glass/Plastic)
Synthetic Alloy and Amorphous Solid (SiO2/Polymer)
not a rock
Chert (with nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary