Sandstone (with concrete/human-made layer)
Clastic Sedimentary Rock (primarily Quartz/Feldspar grains)
Category
Browse anthropogenic (man made material mimicking sedimentary rock) specimens identified by the Rock Identifier community.
Sandstone (with concrete/human-made layer)
Clastic Sedimentary Rock (primarily Quartz/Feldspar grains)
Industrial Slag
Anthropogenic Vitreous Slag
Pearl and Garnet Glass
Calcium Carbonate (CaCO3) for pearl; Silicon Dioxide (SiO2) for glass
Asphalt (Road Aggregate)
Bituminous conglomerate
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (SiO2) with metallic oxide impurities
Asphalt Concrete
Bituminous Concrete / Asphaltic Composite
Terrazzo (Synthetic Composite Rock)
Cementitious or Epoxy Resin-bound Aggregates
White pebble, likely quartz or calcite
Indeterminate from image; possible microcrystalline quartz (SiO₂) or calcite (CaCO₃)
Ferrochrome Slag
Anthropogenic slag (Fe-Cr alloy waste)
Man-made Carved Stone (Scream Mask/Skull motif)
Carved Soapstone or Serpentine-rich rock
Conglomerate
Conglomerate (Sedimentary rock containing rounded clasts)
Not a geological specimen
N/A (man-made object)
Synthetic Resin Charm (Seal Shape)
Polymer Resin with plastic glitter / Polyethylene terephthalate glitters
Opalite
Man-made Glass (SiO2 + additives)
Sea Glass
Man-made vitreous material
Asphalt Concrete
Bituminous Concrete
Sea Glass
Amorphous Silicon Dioxide (Man-made glass weathered by nature)
Decorative mosaic cross containing mixed rock and glass fragments
Polychrome aggregate; likely quartz, feldspar, marble, granite, and assorted colored glass
Slag Glass
Vitreous Silicate Residue
Concrete with Aggregate
Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)
Concrete fragment or Conglomerate
Artificial Conglomerate (Concrete) or Natural Conglomerate
Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)
Silicon Dioxide (SiO2) with inclusions/dye
Opalite
Synthetic glass / Opalized glass
Likely tumbled red mineral or glass imitation
Indeterminate; possibilities include red jasper (microcrystalline quartz, SiO₂) or dyed chalcedony
ABS Plastic (Acrylonitrile Butadiene Styrene)
(C8H8)x·(C4H6)y·(C3H3N)z
Clear quartz fragment (rock crystal)
Quartz, silicon dioxide (SiO₂)
Brick fragment (Man-made material)
N/A (Fired clay)
Asphalt Concrete (Bituminous Concrete)
Bituminous aggregate
Diamond (or Simulant)
Carbon (C) or relevant simulant formula (e.g., ZrO2 for Cubic Zirconia)
Asphalt Chunk (Bituminous Concrete)
Aggregated Bitumen / Artificial Breccia
Chert (Chalky Flint Node)
Chert (Microcrystalline Quartz, SiO2)
Concretion (Sandstone)
Carbonate-cemented Sandstone Concretion
Ferro-silicate Slag
Industrial Vitrified Slag (High-silica amorphous glass)
Pet Rock (Man-made Quartzite or Granite Cobble)
Silicon dioxide (SiO2) mixture; commonly composed of Quartz, Feldspar, and Mica
Colorless quartz crystal (likely quartz fragment)
Quartz, silicon dioxide (SiO₂)
Ring with an Orange Inlay
N/A (Man-made object)
Polymer Clay (Mock Mineral)
Polyvinyl chloride (PVC) with plasticizers and pigment
Tumbled clear quartz (rock crystal)
Quartz, silicon dioxide (SiO₂)
Asphalt (Bituminous Concrete)
Bituminous mix / Anthropogenic conglomerate
Red Sandstone or Brick Fragment
Arenite (if sandstone)
Chert (Arrowhead Shard)
Microcrystalline silica (SiO2)
Sandstone (with man-made markings)
Arenite (composed primarily of Quartz, SiO2)