Man-made Jewelry Charm (Enameled Metal)
Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.
Synthetic / Manufactured Artifact
Category
Man Made Material (Constructed)
Browse man made material (constructed) specimens identified by the Rock Identifier community.
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Coquina
Bioclastic Limestone
sedimentary
Bauxite
Bauxite (Al(OH)3, AlO(OH))
sedimentary
Sandstone
Arenite
sedimentary
Chert Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Chert (varietal Flint)
Microcrystalline quartz (SiO2)
sedimentary
Chert (Common Variety, Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Yellow Jasper/Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Nodule)
Chert (Alpha-Quartz, SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Chert (Flint Arrowhead)
Silicon Dioxide (SiO2)
sedimentary
River Pebbles (Chert and Quartzite)
Sedimentary Clastic Rock (Silica-rich)
sedimentary
Native Silver
Silver (elemental Ag)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
sedimentary
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Sandstone
Sandstone (composed predominantly of Quartz, SiO2, with Feldspar and Clay minerals)
sedimentary
Nickel coin (U.S. currency)
Cupronickel (75% Copper, 25% Nickel alloy)
man-made alloy (metallic)
Dark rounded pebble, likely basalt or slag
Probable fine-grained mafic rock; possibly basalt (plagioclase–pyroxene) or industrial iron/steel slag
igneous
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Probable amber fragment
Amber (fossilized plant resin; chiefly amorphous organic resin, commonly dominated by succinite)
gemstone
Flint / Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Chert (Cryptocrystalline Silica, SiO2)
sedimentary
Chert (and associated river cobbles)
Silicon dioxide (SiO2)
sedimentary
Chert (and/or Flint)
Chert (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Yellow Chert (Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Granite
Granite (Felsic Plutonic Rock)
igneous
Goldstone (blue-goldstone–style glass) beads
Artificial aventurine glass, typically silica glass with copper inclusions; not a natural mineral
mineral
Man-made Green Quartz (Lab-grown or Treated)
Silicon Dioxide (SiO2) with artificial coloration
mineral
Sandstone (likely Fossilized Wood or Concrete Simulacrum)
Arenite / Silicified Wood / Anthropogenic Concrete
sedimentary
Chert (often called Flint or Agate nodule)
Cryptocrystalline Quartz (SiO2)
sedimentary
Bituminous Coal (with Anthracite or Vitrinite inclusion)
Organic-rich Sedimentary Rock (Carboniferous classification)
sedimentary
Asphalt Chunk (with aggregate)
Bituminous concrete / Anthropogenic conglomerate
sedimentary (anthropogenic/man-made conglomerate)
Jasper
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (often called Flint)
Chert (SiO2)
sedimentary
Diamond
Carbon (C)
gemstone
Sandstone
Arenite
sedimentary
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Green Slag Glass
Cullet (Amorphous Silicon Dioxide with impurities)
Man-made rock-like material