Bouncy Ball (Synthetic Rubber Polymer)
Polybutadiene / Ethylene Vinyl Acetate (EVA)
Category
Browse antropogenic (man made) specimens identified by the Rock Identifier community.
Bouncy Ball (Synthetic Rubber Polymer)
Polybutadiene / Ethylene Vinyl Acetate (EVA)
Concrete
Anthropogenic Sedimentary Conglomerate (Cement mixture: typically Ca2SiO4, Ca3SiO5, Ca3Al2O6)
Aura Quartz (specifically Titanium Aura Quartz)
Titanium-coated Silicon Dioxide (SiO2 + Ti Coating)
Opalite
Synthetic Opalized Glass
Opalite
Synthetic Glass (Amorphized Silicon Dioxide)
Asphalt Concrete (Bituminous Pavement)
Aggregates in Bitumen Matrix
Slag
Glassy silicate byproduct (anthropogenic material)
Opalite (Synthetic Moonstone/Opal)
Synthetic Silica Glass
Quartz (Engineered Stone Countertop)
Silicon Dioxide (SiO2) with polymer resins
Aluminum Slag
Anthropogenic Aluminum (Al)
Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)
Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)
Tumbled Clear Quartz/Rock Crystal
Silicon Dioxide (SiO2)
Opalite
Man-made Glass (Synthetic Opalized Glass)
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
Asphalt Concrete
Bituminous Concrete (Anthropic Rock)
Chert (Chalky Flint Node)
Chert (Microcrystalline Quartz, SiO2)
Concrete fragment with Aggregate
Anthropogenic Concrete with Calcarious and Siliceous Aggregate
Iron-rich slag or ironstone; appearance is not diagnostic
Likely iron-oxide-rich material (hematite, Fe₂O₃, and/or magnetite, Fe₃O₄); possibly smelting slag
Opalite Egg
Synthetic Glass (Simulated Opal)
Rainbow Hematite Ring
Iron(III) oxide (Fe2O3) with thin-film coating
Polymer Clay (Mock Mineral)
Polyvinyl chloride (PVC) with plasticizers and pigment
Concrete with Aggregate
Artificial Conglomerate (Cement and Aggregate)
Opalite
Opalescent Glass (SiO2 + coloring agents)
Milky quartz (likely)
Quartz, silicon dioxide (SiO₂)
Tumbled black stone, likely black obsidian
Obsidian (volcanic glass; chiefly silica-rich rhyolitic composition)
Blue Goldstone
Man-made glass with cobalt and metal flecks
Painted River Rock
Artificially Coated Sedimentary Rock
Titanium Aura Quartz (Bismuth-coated Druzy)
Silicon Dioxide (SiO2) with Titanium/Metal vapor coating
Blue glassy gemstone-like specimen
Indeterminate; possibly dyed or treated turquoise, blue apatite, or man-made glass
White pebble, likely quartz or calcite
Indeterminate from image; possible microcrystalline quartz (SiO₂) or calcite (CaCO₃)
Polished blue glassy mineral specimen, likely sodalite or blue aventurine
Most consistent with sodalite (Na₈Al₆Si₆O₂₄Cl₂), though dyed quartzite or blue glass cannot be excluded from the photograph
Cubic Zirconia (Jewelry Setting)
Zirconium Dioxide (ZrO2)
Diamond
Native Carbon (C)
Conglomerate
Conglomerate (clastic sedimentary rock)
Blue Slag Glass
Anthropogenic Amorphous Silicon Dioxide
Sea Glass
Amorphous silicon dioxide (man-made glass weathered by nature)
Red glassy gemstone, possibly garnet
Unidentified red transparent material; garnet group (X₃Y₂(SiO₄)₃) is a possibility
Blue Goldstone
Synthetic glass with cobalt and copper inclusions
Cubic Zirconia (Jewelry Setting)
Cubic Zirconia (ZrO2)
Dzi Bead (Etched Chalcedony)
Cryptocrystalline Quartz (SiO2) with chemical etching
Cullet (Slag Glass)
Amorphous Silica (SiO2) with various metal oxide colorants
Dragon's Breath (Mexican Opal Glass)
Artisan Foil Glass (SiO2 based)