Blue Goldstone
Aventurine Glass
Category
Browse anthropogenic sedimentary (man made) specimens identified by the Rock Identifier community.
Blue Goldstone
Aventurine Glass
Strawberry Quartz
Silicon Dioxide (SiO2) with Hematite/Goethite inclusions
Black tumbled stone, possibly obsidian
Obsidian (volcanic glass; predominantly SiO₂), identification uncertain from image
Chert (specifically a Lithic Flake)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial pigment
Chert (Arrowhead Artifact)
Microcrystalline Quartz (SiO2)
Chert Arrowhead (Lithic Artifact)
Microcrystalline Quartz (SiO2)
Chert Arrowhead (Lithic Artifact)
Chert (Cryptocrystalline Quartz, SiO2)
Possible obsidian or slag glass
Volcanic glass, primarily SiO₂; alternatively industrial iron-rich glassy slag
Fluorite (Polished Point/Tower)
Calcium Fluoride (CaF2)
Chert (often called Flint)
Chert (Microcrystalline Quartz, SiO2)
Sea Glass
Amorphous silicon dioxide (SiO2) - Man-made glass tumbled by nature
Slag
Anthropogenic silicate slag
Iron Slag (Industrial Byproduct)
Anthropogenic pyrometallurgical residue
Ferrocoke or Slag
Anthropogenic pyrometallurgical residue
Iron Slag
Anthropogenic Ferro-silicate
Iron Slag
Anthropogenic Iron Silicate
N/A - Image does not contain a rock or mineral
Anthropogenic textile material
Blue Goldstone
Man-made glass with suspended copper, cobalt, or manganese particles
Conglomerate (Asphaltic/Anthropogenic)
Clastic sedimentary rock / Bituminous mixture
Clear quartz tumbled stone
Quartz (silicon dioxide, SiO₂)
Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
Goldstone (Red)
Aventurine Glass (Cupriferous glass)
Blue-dyed tumbled quartz or glass imitation
Quartz (SiO₂), appearance possibly enhanced with blue dye; identity uncertain from image
Cubic Zirconia (Simulated Diamond)
Cubic Zirconia (ZrO2)
Opalite
Synthetic Opalized Glass
Chert Arrowhead
Microcrystalline Quartz (SiO2)
Black glassy fragment, likely obsidian or industrial glass
Volcanic glass (obsidian), chiefly amorphous SiO₂; identification uncertain from image
Blue obsidian-like volcanic glass
Volcanic glass, chiefly silica-rich amorphous material (composition uncertain)
Milky quartz (likely quartz crystal fragment)
Quartz, silicon dioxide (SiO₂)
Chert (Arrowhead Fragment)
Microcrystalline Quartz (SiO2)
Chert (Arrowheads)
Microcrystalline Quartz (SiO2)
Hematite Beads
Hematite (Fe2O3)
Chert Arrowhead
Microcrystalline Quartz (SiO2)
Chert (Arrowhead or Flake)
Microcrystalline quartz (SiO2)
Polished black stone, likely black obsidian
Obsidian (volcanic glass), chiefly silica-rich rhyolitic composition
Pink Tumbled Quartz (Dyed)
Silicon Dioxide (SiO2)
Dyed Crackle Quartz (Green)
Quenching-treated Quartz (Silicon Dioxide, SiO2)
Quartzite (Engineered Stone)
Silicon Dioxide (SiO2) based synthetic composite
Asphalt (Bituminous Pavement Bit)
Bitumen-bound aggregate (Petrochemical-bound composite)
Slag Glass
SiO2 (Silicon Dioxide) with impurities
Opalite
Synthetic Glass, SiO2 base with metallic inclusions