Fossilized oyster shell
Bivalvia; likely an oyster (Ostreidae), partly mineralized with calcite
fossil
Category
Antropogenic (Man Made Industrial Byproduct)
Browse antropogenic (man made industrial byproduct) specimens identified by the Rock Identifier community.
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Diamond (in jewelry setting)
Adamantine Carbon (C)
mineral
Fired Clay Brick (Anthropic Rock substitute)
Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)
metamorphic (man-made / anthropic)
Diamond
Diamond (Pure Carbon, C)
mineral
Diamond (Cluster Ring)
Carbon (C)
mineral
Synthetic Blue Aura Quartz
Silicon Dioxide (SiO2) with Metallic Infusion
mineral (synthetic/man-made coating)
Man-made Green Quartz (Lab-grown or Treated)
Silicon Dioxide (SiO2) with artificial coloration
mineral
Chert with Limestone
Silicon Dioxide (SiO2) in Calcium Carbonate (CaCO3) Matrix
sedimentary
Diamond (faceted)
Diamond (Pure Carbon, C)
mineral
Tumbled amber-colored chalcedony or jasper
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/jasper
mineral
Green Glass Cullet / Recycled Glass
Amorphous Silicon Dioxide (SiO2) with various metal oxides
Man-made Glass (Not a natural rock or mineral)
Pink calcite (likely)
Calcite — calcium carbonate, CaCO₃
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Chert (Arrowhead Shard)
Microcrystalline silica (SiO2)
sedimentary
Chert (Nodule)
Chert (Alpha-Quartz, SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Diamond
Carbon (C)
gemstone
Diamond (in a jewelry setting)
Cubic Carbon (C)
mineral
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Diamond
Carbon (C)
mineral
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
mineral
Basalt
Basalt (containing plagioclase, pyroxene, and olivine)
igneous
Blue goldstone beads
Man-made aventurine glass (silica glass with metallic copper inclusions), not natural lapis lazuli
mineral
Diamond
Natural Diamond (Carbon, C)
gemstone
Chert (and associated river cobbles)
Silicon dioxide (SiO2)
sedimentary
Sandstone (Red/Brown Variety)
Arenite (composed primarily of SiO2 with Fe2O3 iron oxide inclusions)
sedimentary
Raw Diamond
Carbon (C)
gemstone
Eroded Brick or Pumice-like Scoria
Vesicular Basalt / Scoria (Anthropogenic variant: Eroded Firebrick)
igneous
United States Quarter Dollar
Cupronickel Clad Alloy (75% Copper, 25% Nickel over a 100% Copper core)
Metal / Man-made mineral-like object
Goldstone
N/A (Synthetic Glass with Copper Inclusions)
Manufactured Glass
Asphalt Concrete
Bituminous Concrete / Asphaltic Composite
not a natural rock (man-made composite)
Diamond (Cut Gemstone)
Natural Carbon (C)
gemstone
Diamond
C (Native Carbon)
gemstone
Asphalt (Bituminous Concrete)
Bituminous mix / Anthropogenic conglomerate
man-made composite (lithified equivalent of sedimentary)
Rough Diamond
Diamond (pure Carbon, C)
mineral
Diamond
Carbon (C)
mineral
Desert Rose (Gypsum)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Diamond in Kimberlite
Diamond (C in Kimberlite Matrix)
igneous
Chert (Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Diamond
Carbon (C)
gemstone
Green Aventurine
Quartz (SiO2) with Fuchsite inclusions
Mineral
Desert Rose (also known as Sand Rose)
Gypsum (CaSO4·2H2O) or Barite (BaSO4) with sand inclusions
mineral