Chert (Flint)
Microcrystalline Quartz (SiO2)
Category
Browse anthropogenic (human made) sedimentary like material specimens identified by the Rock Identifier community.
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (with nodule)
Microcrystalline Quartz (SiO2)
Asphalt (Bituminous Pavement Bit)
Bitumen-bound aggregate (Petrochemical-bound composite)
Concrete with Aggregate
Artificial Conglomerate (Cement and Aggregate)
Asphalt (Road Aggregate)
Bituminous Conglomerate / Asphalt Concrete
Black Chert River Stone
Cryptocrystalline Quartz (SiO2)
Goldstone (blue-goldstone–style glass) beads
Artificial aventurine glass, typically silica glass with copper inclusions; not a natural mineral
Blue Impression Jasper beads
Impression jasper (microcrystalline quartz/chalcedony), chiefly SiO₂, with iron-oxide and other mineral inclusions
Blue Goldstone
Aventurine Glass
Cupronickel (on a 1981 Mexico 20 Pesos coin)
Copper-Nickel Alloy (Cu75Ni25)
Chert (specifically Tan/Gray Chert)
Microcrystalline quartz (SiO2)
Aura Quartz (Anomalously Coated Quartz)
Silicon Dioxide (SiO2) treated with vaporized metals
Concrete
Hydrated Portland Cement Aggregate Composite
Chert (Nodular or Massive Variety)
Cryptocrystalline Quartz (SiO2)
Gold
Native Gold (Au)
Chert (varietal Flint)
Chert (SiO2)
Chert / Flint
Microcrystalline Quartz (SiO2)
Dark rounded pebble, likely basalt or slag
Probable fine-grained mafic rock; possibly basalt (plagioclase–pyroxene) or industrial iron/steel slag
Chert (Arrowhead/Artifact Fragment)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Carved Stone Turtle
Carved Soapstone and Quartz
Chert (Flint)
Silicon Dioxide (SiO2)
Likely weathered iron-rich rock or slag fragment
Uncertain; possibly limonite/goethite-rich material (FeO(OH)·nH₂O)
Slag (Industrial Glass)
Anthropogenic Amorphous Vitreous Silicate
Blue-dyed Quartz Druzy
Silicon Dioxide (SiO2) with artificial pigment
Chert (White Chert/Flint)
Microcrystalline Quartz (SiO2)
Chert
Microcrystalline Quartz (SiO2)
Goldstone
Aventurine glass (Synthetic glass with copper inclusions)
Synthetic Convention Badge (Plastic/PVC)
Polyvinyl Chloride (PVC) / Polycarbonate
Asphalt (Road Aggregate)
Bituminous conglomerate
Chert (Chert / Flint Variety)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
Chert (Jasper)
Silicon dioxide (SiO2)
Asphalt / Road Aggregate
Bituminous Conglomerate (synthetic)
Chert (Chalcedony/Agate variety)
Silicon Dioxide (SiO2)
Bismuth Crystal
Bismuth (Bi)
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
Chalcedony (or a variety of Chalcedony, likely Agate or Jasper)
Chalcedony (SiO₂)
Chert (Flint pebble)
Microcrystalline Quartz (SiO2)
Chert (Arrowhead)
Microcrystalline Quartz (SiO2)
Asphalt (Bituminous Concrete)
Bituminous mix / Anthropogenic conglomerate
Brick
Fired clay or Ceramic material (no specific mineralogical scientific name as it's a composite)
Chert (Flint nodule)
Silicon dioxide (SiO2)
Chert (often called Flint in archaeological contexts)
Silicon Dioxide (SiO2)