Concrete
Anthropogenic Sedimentary Conglomerate (Cement mixture: typically Ca2SiO4, Ca3SiO5, Ca3Al2O6)
sedimentary (artificial)
Category
Man Made Glass
Browse man made glass specimens identified by the Rock Identifier community.
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Opalite-style pendant (likely synthetic glass, not natural opal)
Opalescent glass; commonly sold as “opalite” (not a recognized mineral species)
gemstone
Cherry Quartz with Rose Quartz
Crystalline Quartz (SiO2) with glass-based synthetic components
gemstone
Likely blue-green glassy slag or a weathered mineral fragment
Unidentified; the image does not show diagnostic features sufficient for a mineral identification
mineral
Asphalt Concrete (Bituminous Pavement)
Aggregates in Bitumen Matrix
Technogenic / Anthropogenic Pavement Material
Slag
Glassy silicate byproduct (anthropogenic material)
industrial byproduct
Quartz (Engineered Stone Countertop)
Silicon Dioxide (SiO2) with polymer resins
Sedimentary-like (Industrial Composite)
Aluminum Slag
Anthropogenic Aluminum (Al)
mineral
Blue sea glass or blue glassy mineral fragment
Uncertain; likely man-made soda-lime glass, not a natural mineral
mineral
Green sea glass (likely slag glass or bottle glass)
Man-made soda-lime silicate glass; not a naturally occurring mineral
mineral
Goldstone (likely red/brown aventurine glass)
Man-made aventurine glass; copper-bearing silicate glass (not a natural mineral)
mineral
Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)
Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)
Synthetic (Ceramic)
Fluorite (Polished Point/Tower)
Calcium Fluoride (CaF2)
mineral
Diamond / Clear Quartz / Glass paste
Carbon (Diamond) / Silicon Dioxide (Quartz)
gemstone
Concrete fragment with Aggregate
Anthropogenic Concrete with Calcarious and Siliceous Aggregate
sedimentary (anthropogenic/man-made)
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
gemstone
Asphalt Concrete
Bituminous Concrete (Anthropic Rock)
sedimentary
Chert (Chalky Flint Node)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Iron-rich slag or ironstone; appearance is not diagnostic
Likely iron-oxide-rich material (hematite, Fe₂O₃, and/or magnetite, Fe₃O₄); possibly smelting slag
mineral
Rainbow Hematite Ring
Iron(III) oxide (Fe2O3) with thin-film coating
mineral
Polymer Clay (Mock Mineral)
Polyvinyl chloride (PVC) with plasticizers and pigment
Synthetic material (Not a natural rock/mineral)
Concrete with Aggregate
Artificial Conglomerate (Cement and Aggregate)
sedimentary
Green glassy mineral fragment, possibly fluorite
Fluorite (calcium fluoride, CaF₂), tentative identification
mineral
Iron Slag (Industrial Byproduct)
Anthropogenic Vitrification Product/Ferrous Slag
Mineral-like Industrial Smelting Waste
Ferrochrome Slag
Anthropogenic slag (Fe-Cr alloy waste)
industrial byproduct
Milky quartz (rough fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Concrete / Anthropogenic Conglomerate
Man-made composite material (Portland cement, aggregate, and water)
not a natural rock
White pebble, likely quartz or calcite
Indeterminate from image; possible microcrystalline quartz (SiO₂) or calcite (CaCO₃)
mineral
Cubic Zirconia (Jewelry Setting)
Zirconium Dioxide (ZrO2)
gemstone
Diamond
Native Carbon (C)
mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Cubic Zirconia (Jewelry Setting)
Cubic Zirconia (ZrO2)
gemstone
Aluminum Slag
Anthropogenic Aluminum (Al)
mineral
Dzi Bead (Etched Chalcedony)
Cryptocrystalline Quartz (SiO2) with chemical etching
mineral
Concrete / Conglomerate (Man-made)
Artificial Conglomerate (Cementitious Composite)
sedimentary
Ferro-slag (Leland Blue/Slag Glass)
Anthropogenic Vitreous Silica (Industrial Slag)
igneous
Slag
Anthropogenic Vitreous Silica/Iron oxides
mineral-like byproduct
Concrete rubble
Anthropogenic conglomerate
sedimentary
Lava Rock with Fabric Impression
Scoria or Basalt with anthropogenic impressions
igneous
Dalmatian Stone
Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)
igneous
Botryoidal chalcedony (likely agate/jasper variety)
Microcrystalline quartz, SiO₂
mineral
Titanium Aura Quartz
Silicon Dioxide (SiO2) coated with Titanium and Niobium
mineral