Sandstone
Arenite
Category
Browse man made rock (sedimentary analogue) specimens identified by the Rock Identifier community.
Sandstone
Arenite
Sandstone (likely Quartzose)
Clastic sedimentary rock (SiO2 primary)
Sandstone (Quartz Arenite)
Sandstone (dominated by SiO2 quartz grains)
Sandstone
Arenite (primarily SiO2)
Cobalt Glass Slug (Cullet)
Man-made Silicate Glass with Cobalt Oxide (CoO)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Clastic sedimentary rock (Quartz arenite/Arkose)
Sandstone (specifically Arkose or Quartz Arenite)
Arenite (primarily SiO2 with possible Feldspar)
Man-made Ceramic / Clay Figurine
Aluminosilicate Ceramic (Processed Clay)
Chalk
Calcium Carbonate (CaCO3)
Green Agate
Silicon dioxide (SiO₂)
Libyan Desert Glass
Impact-melt silica glass (SiO2 + traces of Al, Fe, Ti)
Man-made Metal Pin (Non-geological)
Antimony-Lead Alloy or Zinc/Brass Base with Electroplating
Dyed Crackle Quartz
Silicon Dioxide (SiO2) with synthetic dye
Asphalt Chunk (with aggregate)
Bituminous concrete / Anthropogenic conglomerate
Chert (Flint)
Microcrystalline quartz (SiO2)
Sandstone
Arenite (SiO2 principal)
Dyed Dragon Vein Agate
Silicon Dioxide (SiO2) with artificial pigment
Cubic Zirconia (Man-made)
Cubic Zirconia (ZrO2) with Enamel and Metal Alloy
Fossilized Coral (Coquina/Limestone)
Cnidaria Anthozoa (Fossilized)
Chert (often called Flint)
Chert (Microcrystalline or cryptocrystalline Silica, SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
Carved Mottled Greenish-Yellow Crystal/Glass Object
Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.
Sandstone
Arenite (composed primarily of Quartz: SiO2)
Red Sandstone
Arenite (Ferruginous Sandstone)
Coquina / Fossiliferous Limestone
Calcareous bioclastic sedimentary rock (CaCO3)
Basalt
Basalt
Petoskey Stone
Hexagonaria percarinata (Fossilized Coral)
Bivalve Fossil (Shell Fragment)
Class Bivalvia (Calcium Carbonate - CaCO3)
Chalk
Carbonate rock (mainly CaCO3)
Sandstone (likely Quartzose Sandstone)
Arenite
Green Glass Slag
Amorphous Silicon Dioxide (SiO2) with metal oxide impurities
Opalite (a synthetic glass, often confused with Opal)
Silicon dioxide glass (SiO2nH2O, for natural opal)
Sandstone (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
Coquina
Bioclastic Limestone (composed primarily of CaCO3)
Chert (Jasper type)
Microcrystalline Quartz (SiO2)
Diamond Druzy (Crystalline Diamond)
Carbon (C)
Bituminous Coal (with Anthracite or Vitrinite inclusion)
Organic-rich Sedimentary Rock (Carboniferous classification)
Sandstone (Pebble)
Sandstone (arenite, arkose, wacke depending on composition)
Chert (or Flint)
Chert (cryptocrystalline quartz), SiO2
Chert (River Siltstone/Quartzite type)
Microcrystalline Quartz (SiO2)