Opalite
Synthetic glass / Opalized glass
gemstone
Category
Antropogenic Rock (Man Made)
Browse antropogenic rock (man made) specimens identified by the Rock Identifier community.
Learn about Antropogenic Rock (Man Made) in the encyclopedia
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Diamond (or Simulant)
Carbon (C) or relevant simulant formula (e.g., ZrO2 for Cubic Zirconia)
gemstone
Metal Chain Belt with Square Plates
Not applicable (man-made)
Man-made Object (Metalwork)
Asphalt (Road Aggregate)
Bituminous conglomerate
sedimentary
Felsic Drill Core (likely Gneiss or Granite)
Felsic Metamorphic Rock (Gneissic profile)
metamorphic
Opalite
Man-made Glass (SiO2 + additives)
mineraloid (synthetic)
Blue Slag Glass
Man-made Silicon Dioxide (Amorphous)
Anthropogenic (Man-made)
Stainless Steel (Polished)
Ferrous Alloy containing Iron (Fe), Chromium (Cr), and Carbon (C)
Mineral equivalent / Metal Alloy
Sandstone Concretion
Clastic Sedimentary Concretion (SiO2 with Iron Oxide)
sedimentary
Diamond
Native Carbon (C)
gemstone
Concretion
Sedimentary Concretion (Ironstone / Calcite Concretion)
sedimentary
Sandstone Concretion
Sedimentary Clastic Rock (Silicate-rich)
sedimentary
Conglomerate
Conglomerate (Sedimentary rock containing rounded clasts)
sedimentary
Concrete Fragment
Hardened Portland Cement Composite
Anthropogenic (Man-made material mimicking sedimentary rock)
Conglomerate
Clastic Sedimentary Rock (Conglomerate)
sedimentary
Asphalt / Road Aggregate
Bituminous Conglomerate (synthetic)
sedimentary
Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)
Silicon Dioxide (SiO2) with inclusions/dye
gemstone
Opalite
Synthetic glass / Opaque silicious glass
gemstone
Granite with Cupules / Bedrock Mortars
Granite (felsic intrusive plutonic rock)
igneous
Slag
Metallurgical by-product
Anthropogenic (Man-made material)
Crescent Pebble
Weathered Quartzite or Sandstone Fragment
sedimentary
Transit Token (RTD Denver)
Nickel-plated brass or bronze alloy (Cu-Sn-Zn-Ni)
not a rock or mineral (anthropogenic material)
Asphalt Concrete (Bituminous Pavement)
Aggregates in Bitumen Matrix
Technogenic / Anthropogenic Pavement Material
Boxwork or Septarian Concretion
Septarian nodule / Boxwork weathering
sedimentary
Sandstone Concretion
Septarian or Carbonate-cemented Sandstone Concretion
sedimentary
Dyed Agate / Painted Stone
Silicon Dioxide (SiO2) with artificial pigment
sedimentary (base), then artificial
Asphalt (Road Aggregate)
Bituminous Conglomerate / Asphalt Concrete
Anthropogenic (Man-made)
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
mineral
Opalite
Synthetic Opalised Glass
glass
Diamond (or Simulant)
Carbon (C)
gemstone
Sandstone (with concrete/human-made layer)
Clastic Sedimentary Rock (primarily Quartz/Feldspar grains)
sedimentary
Sea Glass
Silicon dioxide (mostly)
mineral
Blue Slag Glass
Amorphous Silica (Byproduct of smelting)
Antropogenic (Man-made)
Asphalt Chunk (Bituminous Concrete)
Aggregated Bitumen / Artificial Breccia
sedimentary
Asphalt (Bituminous Pavement)
Bituminous mix (Aggregates with Bitumen binder)
sedimentary
Bouncy Ball (Synthetic Rubber Polymer)
Polybutadiene / Ethylene Vinyl Acetate (EVA)
Synthetic material (Not a rock or mineral)
Chakra Stone (Composite / Man-made Bonded Gemstones)
Composite of Quartz, Lapis Lazuli, Aventurine, Tiger's Eye, and Jasper (SiO2, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, etc.)
Combined Minerals / Metaphysical stones
Clear quartz sphere
Quartz (silicon dioxide, SiO₂)
mineral
Slag
Metallurgical Slag
igneous
Weathered iron-rich concretion or ironstone nodule
Goethite–hematite limonite concretion (FeO(OH), Fe₂O₃, and hydrated iron oxides)
sedimentary
Chert Concretion
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Quartz pebble (Quartztite fragment)
Silicon Dioxide (SiO2)
mineral