Shale
Shale (fine-grained clastic sedimentary rock)
Sedimentary
Category
Anthropogenic (Man Made Material Processed By Nature)
Browse anthropogenic (man made material processed by nature) specimens identified by the Rock Identifier community.
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Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron inclusions
sedimentary
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Turquoise cabochon
Turquoise; hydrated copper–aluminum phosphate, approximately CuAl6(PO4)4(OH)8·4H2O (composition varies)
gemstone
Diamond
Carbon (C)
gemstone
Chert with Limestone
Silicon Dioxide (SiO2) in Calcium Carbonate (CaCO3) Matrix
sedimentary
Blue-dyed Quartz Druzy
Silicon Dioxide (SiO2) with artificial pigment
mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Rough Diamond
Diamond (Pure Carbon: C)
mineral
Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Green Aventurine
Quartz (SiO2) with Fuchsite inclusions
Mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Quartzite
Quartzite (Metamorphosed Quartz Sandstone)
metamorphic
Artificial Rock Face (Faux Rock)
Glass Fiber Reinforced Concrete (GFRC)
man-made/construction material
Chrysocolla in Matrix
Hydrated copper silicates (Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O))
mineral
Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Dyed Blue Agate
Silicon Dioxide (SiO2)
Mineral
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Raw Calcite
Calcium Carbonate (CaCO3)
mineral
Synthetic Zinc/Polycarbonate Composite (Bey-specimen)
Zinc Alloy (Zamak 3) with Polycarbonate (C15H16O2)n Overlay
Anthropogenic Mineral Mimic
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Carved quartz skull, likely smoky quartz or gray chalcedony
Silicon dioxide (SiO₂), quartz or microcrystalline quartz
gemstone
Fossilized Megalodon Tooth Fragment
Otodus megalodon (Carcharocles megalodon fossil)
sedimentary
Quartzite
Silica (SiO2) quartzite
metamorphic
Jasper
Silicon Dioxide (SiO2)
sedimentary
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Chert (and Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (specifically White Chert or Novaculite)
Silicon Dioxide (SiO₂)
sedimentary
Granite
Phaneritic Igneous Rock (composed mostly of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Jasper with Iron Staining
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) impurities
sedimentary
Coquina
Coquina (Bioclastic Limestone)
sedimentary
Gemstone bead necklace (likely citrine or yellow quartz)
Quartz, SiO₂; precise identification is uncertain because the beads are blurred and metal settings obscure them
gemstone
Aqua Aura Quartz
Titanium/Gold-coated Silicon Dioxide (SiO2)
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Dyed Agate Slice
Silicon Dioxide (SiO2) with artificial colorants
Mineral (variety of Chalcedony)
Red Jasper
Silicon Dioxide with Hematite (SiO2 + Fe2O3)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Rough Topaz
Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)
mineral