Opalite crescent pendant
Opalite (man-made opalescent glass; not a natural mineral)
Category
Browse man made silicate (anthropogenic glass) specimens identified by the Rock Identifier community.
Opalite crescent pendant
Opalite (man-made opalescent glass; not a natural mineral)
Concrete Paver (Artificial Cementitious Rock)
Hydrated Portland Cement Aggregate
Unidentifiable Rock Fragment
Citrine Quartz
Citrine (Silicon Dioxide, SiO2)
Crushed Stone (Likely Limestone or Granite)
Calcium Carbonate (CaCO3) for Limestone / Quartz and Feldspar for Granite
Slag (Industrial Glass/Metal)
Ferrous slag or Glassy silicate byproduct
Aura Quartz (Titanium Quartz)
Titanium-coated Silicon Dioxide (SiO2 + Ti)
Concretion (Sandstone)
Carbonate-cemented Sandstone Concretion
Opalite
Synthetic Glass, SiO2 base with metallic inclusions
Iron Slag
Ferrous slag (primarily silicates and oxides of calcium, iron, and magnesium)
Asphalt Concrete
Bituminous Concrete
Titanium Aura Quartz
Titanium bonded Silicon Dioxide (SiO2 + Ti)
Black Obsidian
Amorphous volcanic glass (SiO2 + impurities)
Opalite
Synthetic Opalised Glass
Polished black stone, likely black obsidian
Obsidian (volcanic glass), chiefly silica-rich rhyolitic composition
Goldstone (Red)
Aventurine Glass (SiO2 + Cu)
Blue Obsidian
Volcanic Glass (SiO2 with inclusions)
Tektite
Impactite (Natural Silicate Glass)
Aura Quartz (specifically Titanium Aura Quartz)
Titanium-coated Silicon Dioxide (SiO2 + Ti Coating)
Cherry Quartz with Rose Quartz
Crystalline Quartz (SiO2) with glass-based synthetic components
Polished brown jasper (likely brecciated or orbicular jasper)
Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and other mineral inclusions
Libyan Desert Glass
Impact-melt silica glass (SiO2 + traces of Al, Fe, Ti)
Sandstone (likely Fossilized Wood or Concrete Simulacrum)
Arenite / Silicified Wood / Anthropogenic Concrete
Blue-green cabochon, likely chalcedony or treated glass imitation
Cryptocrystalline quartz (chalcedony/possibly chrysoprase); identification uncertain from image
Synthetic Resin / Plastic Figurine
Synthetic Polymer (Copolymer of Polyethylene or Resin)
Asphalt / Road Aggregate
Bituminous Conglomerate (synthetic)
Aura Quartz
Titanium or Gold bonded Silicon Dioxide (SiO2)
Bouncy Ball (Synthetic Rubber Polymer)
Polybutadiene / Ethylene Vinyl Acetate (EVA)
Opalite (Man-made Glass)
Fused glass (typically made of dolomite and metal opacifiers)
Asphalt (Bituminous Concrete)
Bituminous mix / Anthropogenic conglomerate
Quartz (Engineered Stone Countertop)
Silicon Dioxide (SiO2) with polymer resins
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
Chert (Chalky Flint Node)
Chert (Microcrystalline Quartz, SiO2)
Goldstone (Brown/Gold variety)
Aventurine Glass (SiO2 with Copper inclusions)
Raw quartz crystal
Quartz (silicon dioxide, SiO₂), likely milky or included quartz
Fluorite (Polished Point/Tower)
Calcium Fluoride (CaF2)
Ferrochrome Slag
Anthropogenic silicate/oxide glass (Complex silicate matrix with Cr-Fe-Si inclusions)
Cubic Zirconia (Jewelry Setting)
Zirconium Dioxide (ZrO2)
Diamond
Native Carbon (C)
Conglomerate
Conglomerate (clastic sedimentary rock)
Diamond / Clear Quartz / Glass paste
Carbon (Diamond) / Silicon Dioxide (Quartz)
Rainbow Hematite Ring
Iron(III) oxide (Fe2O3) with thin-film coating