Diamond (in a gold ring)
Diamond (pure carbon, C)
Category
Browse antropogenic (man made industrial byproduct) specimens identified by the Rock Identifier community.
Diamond (in a gold ring)
Diamond (pure carbon, C)
Slag (Industrial Glass)
Artificial Vitreous Silicate
Goldstone (Brown/Gold variety)
Aventurine Glass (SiO2 with Copper inclusions)
Fluorite (Polished Point/Tower)
Calcium Fluoride (CaF2)
Blue Goldstone
Goldstone (artificial glass)
Polished black stone, likely black obsidian
Obsidian (volcanic glass), chiefly silica-rich rhyolitic composition
Sandstone Anvil / Nutting Stone
Quartzose Sandstone (Sedimentary Rock)
Pink Tumbled Quartz (Dyed)
Silicon Dioxide (SiO2)
Dyed Crackle Quartz (Green)
Quenching-treated Quartz (Silicon Dioxide, SiO2)
Chert Concretion (with typical hematite/limonite staining)
Sedimentary Concretion (SiO2 with FeO(OH)⋅nH2O)
Pyrite Concretion (Grapestone)
Iron Sulfide (FeS2) Concretion
Sandstone Concretion
Clastic Sedimentary Rock (primarily SiO2 with mineral cement)
Aura Quartz (Titanium/Gold coated)
Silicon Dioxide (SiO2) with metallic vapor deposition
Diamond (or Simulant)
Carbon (C) or Cubic Zirconia (ZrO2)
Diamond
Carbon (C)
Opalite
Synthetic Glass, SiO2 base with metallic inclusions
Opalite
Synthetic Opalized Glass
Opalite
Synthetic Opalite Glass (Silicon Dioxide)
Iron Slag
Iron smelting byproduct (Glassy/vesicular silicate)
Polished blue calcite sphere (tentative identification)
Calcite, CaCO₃; blue color generally results from trace impurities or inclusions
Diamond (or Diamond Simulant)
Carbon (C)
Black Obsidian
Amorphous volcanic glass (SiO2 + impurities)
Slag (Industrial Glassy Byproduct)
Ferro-silicate Slag
Synthetic Resin (Artificial Specimen)
Polyurethane or Polyester Resin
Conglomerate
Conglomerate Rock (Paraconglomerate)
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2)
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
Copper slag or vesicular basalt with copper minerals
Industrial slag / Basaltic matrix with secondary copper minerals
Titanium Amethyst Geode
Silicon Dioxide (SiO2) with Titanium/Metal Vapor Deposition Layer
Metal Alloy (Likely Pewter or Sterling Silver)
Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).
Synthetic Convention Badge (Plastic/PVC)
Polyvinyl Chloride (PVC) / Polycarbonate
Opalite
Synthetic Opalised Glass
Aura Quartz
Titanium/Titanium-Gold treated Silicon Dioxide (SiO2)
Sea Glass (White/Clear)
Amorphous Silica (Alkali-Lime-Silica Glass), SiO2 + Na2O + CaO
Anthracite Coal with Sulfur staining
Anthracite (Carbon C with impurities)
Blue Goldstone
Man-made glass with suspended copper, cobalt, or manganese particles
Goldstone
Aventurine Glass (Man-made glass with copper inclusions)
Granite with Cupules / Bedrock Mortars
Granite (felsic intrusive plutonic rock)
Ferruginous Slag (Iron Smelting Byproduct)
Anthropogenic Vitreous Silicate (often containing Fayalite: Fe2SiO4)
Polished blue-green glassy slag or coated mineral fragment
Most likely man-made colored glass/slag; exact composition cannot be determined visually
Slag Glass
Glassy Silicate Residue
Orange Calcite
Calcium Carbonate (CaCO3)