Sandstone
Arenite
sedimentary
Category
Mineral Description (Anthropogenic Material)
Browse mineral description (anthropogenic material) specimens identified by the Rock Identifier community.
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Quartz Geode
Silicon Dioxide (SiO2)
mineral
Diamond (in Jewelry Setting)
Carbon (C) - Isometric-Hexoctahedral
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (likely Ferruginous)
Sandstone (SiO2 with iron oxides)
sedimentary
Sandstone (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
sedimentary
Iron-stained Quartz Pebble
Silicon Dioxide (SiO2) with iron oxide inclusions (Limonite/Goethite)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Carved serpentine wing sculpture
Serpentine-group rock, chiefly antigorite/lizardite: Mg3Si2O5(OH)4
metamorphic
Sandstone Pebble
Sedimentary Clastic Rock (Quartz Arenite)
sedimentary
Sandstone (with Chert/Quartzite)
Arenite (SiO2 primarily)
sedimentary
Sandstone (Quartzite-rich)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Sandstone (SiO2 rich)
sedimentary
Tumbled chalcedony (likely moss or dendritic agate)
Microcrystalline quartz, SiO₂, with iron-oxide inclusions
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
River Stone (Greywacke)
Greywacke (immature sandstone)
sedimentary
Ferrous Slag (Iron Smelting By-product)
Fused Siliceous Slag
Anthropogenic Material (Man-made Rock)
Sea Glass (Kelly Green)
Amorphous Silica (Silicon Dioxide with Iron/Chromium additives)
Anthropogenic specimen (Man-made material)
Banded malachite cabochon
Malachite, Cu₂CO₃(OH)₂; the dark bands may be manganese-oxide or other sulfide-rich matrix, and could also indicate a composite or treated specimen
mineral
Sandstone (with potential Arkose/Lithic characteristics)
Arenite (Sedimentary rock composed of sand-sized grains)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Fossilized plant material (Silicon dioxide - SiO2)
fossil
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
Sandstone
Arenite
sedimentary
Banded Sandstone / Quartzite with Mineral Veins
Sedimentary rock (Quartz arenite with iron oxide/silica banding)
sedimentary
Sandstone with Iron Staining
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Gray chalcedony (microcrystalline quartz)
Chalcedony, SiO₂; likely common gray/blue-gray variety
mineral
Diamond
Carbon (C)
mineral
Diamond (or Diamond Simulant/Cubic Zirconia)
Carbon (C) - if diamond, or Zirconium dioxide (ZrO2) - if Cubic Zirconia
mineral
Aragonite Star Cluster
Aragonite (CaCO3)
mineral
Asphalt (Bituminous Pavement)
Bituminous mix (Aggregates with Bitumen binder)
sedimentary
Sandstone (Siltstone or Fine-grained)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (with potential iron-oxide weathering)
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
mineral
Tumbled Red Jasper
Quartz (Microcrystalline variety of chalcedony, SiO2)
mineral
Polished green moss agate cabochon
Moss agate: microcrystalline quartz (SiO₂) with included chlorite/actinolite or iron-manganese minerals
mineral
Yellow Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
mineral
Quartz with Muscovite Mica
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide Fluoride (KAl2(AlSi3O10)(F,OH)2)
mineral