Quartz Pebble
Silicon Dioxide (SiO2)
Category
Browse industrial byproduct (anthropogenic rock) specimens identified by the Rock Identifier community.
Quartz Pebble
Silicon Dioxide (SiO2)
Chert Arrowhead
Microcrystalline Quartz (SiO2)
Sea Glass
Man-made silicate glass weathering product
Blue Dyed Quartzite
Silicon Dioxide (SiO2) with artificial pigment
Silver (Native Element)
Ag (Argentum)
Chert (Arrowhead/Projectile Point)
Microcrystalline quartz (SiO2)
Chert (Arrowhead)
Chert (SiO2)
Chert (often called Flint)
Chert (Microcrystalline Quartz, SiO2)
Note: Item is not a geological specimen
Polyester mesh and Ethylene-vinyl acetate (EVA) polymer
Grooved Maun Ball (Maul/Hammerstone-like Concretion)
Calcareous/Ferruginous Concretion in Sandstone Matrix
Carborundum (Silicon Carbide)
Silicon carbide (SiC)
Chert Arrowhead
Microcrystalline Quartz (SiO2)
Concrete Fragment
Hardened Portland cement and mineral aggregate
Chert (Arrowhead Artifact)
Microcrystalline Quartz (SiO2)
Yellow Calcite
Calcium Carbonate (CaCO3)
Orange Calcite
Calcium Carbonate (CaCO3)
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
Chert (Yellow Jasper)
Cryptocrystalline Quartz (SiO2)
Ambergris
Ambra grisea (Metabolic byproduct)
Chert Arrowhead
Cryptocrystalline Quartz (SiO2)
Chert (Arrowhead or Flake)
Microcrystalline quartz (SiO2)
Chalcanthite
Hydrated copper(II) sulfate (CuSO4·5H2O)
Gold
Native Gold (Au)
Green Fluorite
Calcium Fluoride (CaF2)
Sea Glass
Amorphous Silicon Dioxide (Man-made glass weathered by nature)
Chert (Arrowheads)
Microcrystalline Quartz (SiO2)
Chert (Arrowhead Fragment)
Microcrystalline Quartz (SiO2)
Asphalt (Bituminous Concrete)
Bituminous mix containing aggregates and petroleum-based binder (CnH2n+2)
Transit Token (RTD Denver)
Nickel-plated brass or bronze alloy (Cu-Sn-Zn-Ni)
Sea Glass
Man-made silicate glass
Chert (Arrowhead Fragment)
Silicon Dioxide (SiO2)
Chert Arrowhead
Microcrystalline Quartz (SiO2)
Tiffany Stone
Bertrandite (with Fluorite, Opal, and Chalcedony), Be4Si2O7(OH)2
Chert (Flint)
Chert (SiO2)
Sulfur
Native Sulfur (S)
Sulfur (with possible Cullet Glass or Slag imitation)
Native Sulfur (S8)
Red Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert Arrowhead (Lithic Artifact)
Microcrystalline Quartz (SiO2)
Chert (Arrowhead)
Microcrystalline Quartz (SiO2)
Chert Arrowhead (Projectile Point)
Microcrystalline Quartz (SiO2)
Chert Arrowhead
Microcrystalline Quartz (SiO2)
Chert (specifically Flint Arrowhead)
Silicon dioxide (SiO2) - Microcrystalline Quartz