Ferro-silicate Slag
Industrial Vitrified Slag (High-silica amorphous glass)
Mineral byproduct (Anthropogenic)
Category
Anthropogenic (Man Made)
Browse anthropogenic (man made) specimens identified by the Rock Identifier community.
Learn about Anthropogenic (Man Made) in the encyclopedia
View all →
Blue Sea Glass
Amorphous Silica (Anthropogenic glass)
not a rock (man-made origin)
Metal Chain (Likely Steel or a Steel Alloy)
Steel (primarily iron and carbon); specific alloy unknown
Man-made Object (Metal/Alloy)
Not a geological specimen
N/A (man-made object)
N/A
ABS Plastic (Acrylonitrile Butadiene Styrene)
(C8H8)x·(C4H6)y·(C3H3N)z
Synthetic Polymer (Synthetic Material)
Iron Slag
Iron/Steel Slag (Ferrosilicate Glass)
industrial byproduct (anthropogenic material)
Blue slag glass / industrial smelter slag
Man-made iron-rich silicate slag; composition variable, commonly Fe–Ca–Mg–Al silicates with glassy phases
mineral
Opalite
Synthetic glass (SiO2 + impurities)
mineral
Diamond
Native Carbon (C)
gemstone
Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)
Silicon Dioxide (SiO2) with inclusions/dye
gemstone
Not a rock, mineral, or geological specimen
N/A
Opalite
Synthetic glass / Opaque silicious glass
gemstone
Opalite
Man-made opalescent glass
gemstone
Opalite
Man-made opalized glass
mineral
Goldstone
Aventurine Glass (Man-made)
mineral
Sea Glass
Man-made silicate glass
gemstone
Slag Glass
Amorphous Silicate (Man-made)
industrial byproduct
Ring with an Orange Inlay
N/A (Man-made object)
Man-made Object (Ring)
Sea Glass
Man-made vitreous material
mineral
Industrial Slag
Anthropogenic Vitreous Slag
igneous
Synthetic Costume Accessory (Non-Geological)
Polyester and Acrylic Fiber (Anthropogenic polymer)
Synthetic / Man-made textile
Diamond (or Simulant)
Carbon (C)
gemstone
Terrazzo (Synthetic Composite Rock)
Cementitious or Epoxy Resin-bound Aggregates
Man-made metamorphic-style composite
Synthetic Faux Fur Fursuit
Polyacrylonitrile / Polyester (Synthetic Textile)
not a rock (synthetic material/costume)
Sea Glass
Silicon dioxide (mostly)
mineral
Concrete with Aggregate
Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)
anthropogenic (human-made) sedimentary-like material
Quartz pebble (Quartztite fragment)
Silicon Dioxide (SiO2)
mineral
Cobalt Blue Glass / Cullet Glass
Silicon dioxide (Amorphous man-made glass)
mineral
Chert (Arrowheads)
Microcrystalline Quartz (SiO2)
sedimentary
Pet Rock (Man-made Quartzite or Granite Cobble)
Silicon dioxide (SiO2) mixture; commonly composed of Quartz, Feldspar, and Mica
igneous or metamorphic (base stone); anthropogenic (decoration)
Exposed Aggregate Concrete (Pea Gravel)
Concrete with Siliceous Alluvial Gravels
sedimentary (man-made conglomerate)
Opalite
Synthetic Opalite Glass / Opalized Glass
gemstone
Asphalt Concrete
Bituminous conglomerate
sedimentary
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (SiO2) with metallic oxide impurities
mineraloid
Asphalt Concrete
Bituminous Concrete / Asphaltic Composite
not a natural rock (man-made composite)
Green Obsidian Sphere (man-made glass)
Vitreous Silica with Chromium/Iron additives
mineralogical simulant
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Asphalt (Bituminous Concrete)
Bituminous mix / Anthropogenic conglomerate
man-made composite (lithified equivalent of sedimentary)
![Mystic Topaz (Treated Quartz or Topaz) (Aluminum silicate fluoride hydroxide [Al2SiO4(F,OH)2] with thin-film metallic coating) — gemstone](https://media.rock.id/mystic-topaz-treated-quartz-or-topaz-b5749325-4a81-403d-a0ed-452e3335d125-thumbnail.jpg)
Mystic Topaz (Treated Quartz or Topaz)
Aluminum silicate fluoride hydroxide [Al2SiO4(F,OH)2] with thin-film metallic coating
gemstone
Sandstone Concretion
Limonitic Sandstone Concretion
sedimentary
Asphalt (Road Aggregate)
Bituminous conglomerate
sedimentary
Terrazzo (Man-made Composite)
Cementitious or Resin-bound Lithic Composite
sedimentary (artificial)