Transit Token (RTD Denver)
Nickel-plated brass or bronze alloy (Cu-Sn-Zn-Ni)
not a rock or mineral (anthropogenic material)
Category
Not A Rock Or Mineral (Anthropogenic Material)
Browse not a rock or mineral (anthropogenic material) specimens identified by the Rock Identifier community.
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Note: Item is not a geological specimen
Homo sapiens (Dermal Appendage: Pilus)
Organic / Biological
Concrete
Anthropogenic Conglomerate
sedimentary
Clam shell (likely a bivalve shell)
Bivalvia; shell composed primarily of calcium carbonate (usually aragonite and/or calcite)
fossil
Metallic Ornament / Jewelry
N/A - This is an artificial object, not a geological specimen.
This appears to be a man-made metallic object, likely jewelry, not a natural rock, mineral, or geological specimen.
Note on Image Identification: Textile
N/A (Anthropogenic material)
not a rock
Asphalt Concrete (Bituminous Conglomerate)
Anthropogenic Bituminous Conglomerate
sedimentary
Note: Item is not a geological specimen
Guitar Components (Steel, Nickel, Plastic, Wood)
Synthetic/Consumer Product
Man-made Synthetic Material (Plastic/Composite)
Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)
Non-geological / Synthetic
Note: This is a Man-Made Object (Costume/Prop Patch)
Synthetic fiber and pigments (Cellulose/Plastic-based composite)
Non-geological
N/A - Image does not contain a rock or mineral
Anthropogenic textile material
Non-geological
Concrete rubble
Anthropogenic conglomerate
sedimentary
Pearl necklace
Pearl: biogenic calcium carbonate, primarily aragonite (CaCO₃), in a conchiolin matrix
gemstone
Smelter Slag
Anthropogenic Silicate Slag
igneous
N/A (Non-Geological Object)
N/A
Slag (Industrial Glass/Glassy Rock)
Anthropogenic Vitreous Material
igneous
Aggregate Concrete
Anthropogenic Conglomerate (Technosol)
sedimentary
Green glass-like cabochon, likely synthetic glass or resin
Unidentified green transparent material; possibly molded glass, synthetic spinel, or resin
gemstone
Fordite
Anthropogenic paint-rock
mineraloid (human-made geological specimen)
Unidentified gray metallic object
Not determinable from the image; likely a metal screw or manufactured fastener rather than geological material
mineral
Asphalt Concrete
Bituminous Concrete / Asphaltic Composite
not a natural rock (man-made composite)
Asphalt Concrete
Bituminous Concrete (Anthropic Rock)
sedimentary
Asphalt Chunk (with aggregate)
Bituminous concrete / Anthropogenic conglomerate
sedimentary (anthropogenic/man-made conglomerate)
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Slag (Industrial Byproduct)
Anthropogenic Vitreous Silicate material
igneous
Unable to Identify (Image Obscured)
Indeterminate
Terrazzo (Synthetic Composite Rock)
Cementitious or Epoxy Resin-bound Aggregates
Man-made metamorphic-style composite
Iron Slag (Industrial Byproduct)
Anthropogenic Vitrification Product/Ferrous Slag
Mineral-like Industrial Smelting Waste
Industrial Slag
Anthropogenic Vitreous Slag
igneous
Possible tektite or iron-rich slag-like natural specimen
Uncertain; possibly natural glass (tektite) or magnetite-rich rock
mineral
Druzy Quartz on Quartz Base
Silicon Dioxide (SiO2)
mineral
Slag
Anthropogenic Vitreous Silica/Iron oxides
mineral-like byproduct
Concrete / Anthropogenic Conglomerate
Man-made composite material (Portland cement, aggregate, and water)
not a natural rock
Iron Slag
Anthropogenic Ferro-silicate
mineral
Concrete with Exposed Aggregate
Anthropogenic conglomerate (Concrete)
man-made rock (sedimentary analogue)
Not a geological specimen
N/A (man-made object)
N/A
Quartz Druzy (on Matrix)
Silicon Dioxide (SiO2)
mineral
Granite
Granite — a coarse-grained felsic intrusive igneous rock, typically composed of quartz, feldspar, and mica
igneous
Painted River Rock
Artificially Coated Sedimentary Rock
sedimentary
Lava Rock with Fabric Impression
Scoria or Basalt with anthropogenic impressions
igneous
Asphalt concrete
Anthropogenic conglomerate
sedimentary
Concrete
Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)
sedimentary (anthropogenic / man-made)