Metallic Ornament / Jewelry
N/A - This is an artificial object, not a geological specimen.
Category
Browse man made glass (not a natural rock or mineral) specimens identified by the Rock Identifier community.
Metallic Ornament / Jewelry
N/A - This is an artificial object, not a geological specimen.
Goldstone
Avventurina (Cu + SiO2 glass)
Sandstone (with man-made markings)
Arenite (composed primarily of Quartz, SiO2)
Slag Glass (Cullet)
Amorphous Silica (man-made), primarily SiO2 with trace metal oxides
Crackle Glass (Simulated Gemstone)
Amorphous Solid (SiO2)
Hematite
Iron(III) oxide (Fe2O3)
Cultured Marble (Synthetic)
Polymer-matrix composite (typically calcium carbonate in polyester resin)
Sandstone (with concrete/human-made layer)
Clastic Sedimentary Rock (primarily Quartz/Feldspar grains)
Boxwork or Septarian Concretion
Septarian nodule / Boxwork weathering
Sea Glass
Man-made vitreous material (silica-based glass)
Chert
Microcrystalline Quartz (SiO2)
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial pigment
Blue Goldstone
Auraventurine (Synthetic glass with cobalt and copper inclusions)
Sea Glass (specifically Frosted White)
Amorphous Silica (substance: Sodium-calcium silicate glass)
Porcelain Tile (Sandstone-look)
Man-made Ceramic (resembling Quartz-rich Sandstone)
White quartz pebble or chip
Quartz (silicon dioxide, SiO₂), possibly milky quartz
Unidentified translucent crystal/mineral fragment
Likely quartz (SiO₂), but visual identification is uncertain
Goldstone
Not a natural mineral or rock. It is an ornamental glass.
Asphalt / Road Aggregate
Bituminous Conglomerate (synthetic)
Diamond
Native Carbon (C)
Sea Glass
Man-made silicate glass (Amorphous silicon dioxide)
Slag
Metallurgical by-product
Sandstone Concretion
Septarian or Carbonate-cemented Sandstone Concretion
Libyan Desert Glass
Tektite (high-silica impact glass), SiO2
Concrete rubble
Anthropogenic conglomerate
Slag (Industrial Glass/Glassy Rock)
Anthropogenic Vitreous Material
Goldstone (blue-goldstone–style glass) beads
Artificial aventurine glass, typically silica glass with copper inclusions; not a natural mineral
Transit Token (RTD Denver)
Nickel-plated brass or bronze alloy (Cu-Sn-Zn-Ni)
Man-made Dyed Aura Quartz
Silicon Dioxide (SiO2) with metallic coating/dye
Polished obsidian
Volcanic glass; predominantly rhyolitic SiO₂
Conglomerate
Clastic Sedimentary Rock (Conglomerate)
Tumbled gray stone, likely quartz-rich pebble
Probable microcrystalline quartz/chalcedony (SiO₂), possibly gray jasper or quartzite
Black-and-white agate geode pendant
Agate (microcrystalline quartz, SiO₂), likely a hollow geode slice with chalcedony and drusy quartz
Slag
Glassy silicate byproduct (anthropogenic material)
Sea Glass
Man-made vitreous material (silica glass)
Sea Glass
Amorphous silicon dioxide (Man-made glass weathered by nature)
Brick
Fired clay or Ceramic material (no specific mineralogical scientific name as it's a composite)
Dyed Crackle Quartz
Silicon Dioxide (SiO2) with synthetic dye
Red glassy cabochon, likely synthetic ruby or red glass
Uncertain; possible synthetic corundum (Al₂O₃, chromium-colored) or man-made glass
Likely rough green-blue glassy mineral fragment
Unidentified; the image is insufficient to distinguish a natural mineral from industrial slag or glass
Rounded quartz pebble
Quartz (silicon dioxide, SiO₂)
Sea Glass
Man-made silicate glass (Amorphous silicon dioxide)