Diamond
Native Carbon (C)
mineral
Category
Mineral (Man Modified)
Browse mineral (man modified) specimens identified by the Rock Identifier community.
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Diamond (Colorless/White)
Carbon (C)
mineral
Blue Slag Glass
Anthropogenic Amorphous Silicon Dioxide
mineral
Aura Quartz
Titanium or Gold bonded Silicon Dioxide (SiO2)
mineral
Aura Quartz (Pink/Rose Aura Quartz)
Silicon Dioxide (SiO2) bonded with Platinum and/or Silver
mineral
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
mineral
Concretion with Geode Cavity
Ferruginous Sandstone Concretion with Quartz Center
sedimentary
Milky quartz (likely)
Quartz, silicon dioxide (SiO₂)
mineral
Small rounded mineral pebble, possibly quartz
Uncertain; likely microcrystalline or crystalline SiO₂ (quartz), potentially with iron-oxide staining
mineral
Titanium Aura Quartz
Silicon Dioxide (SiO2) coated with Titanium and Niobium
mineral
Diamond
Carbon (C)
mineral
Diamond (in a jewelry setting)
Carbon (C)
mineral
Tumbled milky quartz
Quartz, silicon dioxide (SiO₂)
mineral
Clear Quartz Sphere (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Opalite
Synthetic Opalite (Man-made glass)
mineral
Asphalt Chunk (Bituminous Concrete)
Aggregated Bitumen / Artificial Breccia
sedimentary
Concrete with Aggregate
Artificial Conglomerate (Cement and Aggregate)
sedimentary
Likely clear quartz pebble or glassy quartz fragment
Quartz (silicon dioxide, SiO₂)
mineral
Diamond (Cut jewelry specimen)
Diamond (pure Carbon, C)
mineral
Aventurine Quartz
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Iron-rich slag or ironstone; appearance is not diagnostic
Likely iron-oxide-rich material (hematite, Fe₂O₃, and/or magnetite, Fe₃O₄); possibly smelting slag
mineral
Opalite Egg
Synthetic Glass (Simulated Opal)
mineral
Rainbow Hematite Ring
Iron(III) oxide (Fe2O3) with thin-film coating
mineral
Tumbled milky quartz
Quartz — silicon dioxide (SiO₂), cryptocrystalline or microcrystalline variety possible
mineral
Aura Quartz (Titanium/Rainbow Quartz)
SiO2 (Silicon Dioxide) with metallic coating
mineral
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
mineral
Blue Slag Glass
Man-made Silicon Dioxide (Amorphous)
Anthropogenic (Man-made)
Aluminum Slag
Anthropogenic Aluminum (Al)
mineral
Dzi Bead (Etched Chalcedony)
Cryptocrystalline Quartz (SiO2) with chemical etching
mineral
Milky quartz (rough quartz fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Rough Sapphire (Corundum)
Corundum (Al2O3)
mineral
Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)
Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)
Synthetic (Ceramic)
Cubic Zirconia (Diamond Simulant)
Zirconium Dioxide (ZrO2)
gemstone
Tumbled Clear Quartz/Rock Crystal
Silicon Dioxide (SiO2)
mineral
Tumbled milky quartz
Quartz (SiO₂), cryptocrystalline-to-massive variety
mineral
Diamond
Native Carbon (C)
mineral
Aura Quartz Geodes (Lab-Altered)
Silicon Dioxide (SiO2) with Metallic Vapor Deposition
mineral
Ironstone Concretion (Pot Stone)
Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)
sedimentary
Asphalt (Bituminous Pavement)
Bituminous mix (Aggregates with Bitumen binder)
sedimentary
Slag Glass
Anthropogenic Amorphous Silicon Dioxide
mineral
Stainless Steel (Polished)
Ferrous Alloy containing Iron (Fe), Chromium (Cr), and Carbon (C)
Mineral equivalent / Metal Alloy
Blue Chalcedony Cube
Silicon Dioxide (SiO2)
mineral