Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (Industrial Man-made)
mineraloid
Category
Man Made Glass
Browse man made glass specimens identified by the Rock Identifier community.
Learn about Man Made Glass in the encyclopedia
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Opalite
Synthetic Glass (Simulated Opal)
gemstone
One Pound Coin (UK)
Nickel-Brass Alloy (Cu-Zn-Ni)
mineral
Green Sea Glass
Man-made vitreous material (silica glass)
gemstone
Opalite
Synthetic Glass (typically Silica/Magnesium based with metal additives)
mineral
Carved opalite pendant
Opalite (man-made opalescent glass; not a natural mineral)
gemstone
Terrazzo (Man-made Composite)
Cementitious or Resin-bound Lithic Composite
sedimentary (artificial)
Sea Glass
Man-made vitreous material / Silicon dioxide
mineral
Opalite
Opalescent Glass (SiO2 + coloring agents)
Mineral (Synthetic/Man-made)
Diamond (or Simulant)
Carbon (C) or relevant simulant formula (e.g., ZrO2 for Cubic Zirconia)
gemstone
Sea Glass
Man-made vitreous material (silica glass)
sedimentary
Polished opalite (likely man-made opalescent glass)
Opalite is a commercial name, not a mineral; typically opalescent glass, often soda-lime silicate glass
mineral
Opalite
Synthetic Glass / Man-made Opal Simulant
gemstone
Sea Glass
Man-made silicate glass (Amorphous silicon dioxide)
sedimentary
Beads (likely glass or man-made material)
N/A (artificial material)
Man-made material, not a natural rock or mineral specimen
Opalite
Synthetic Opalised Glass
mineral
Opalite-style glass pendant
Man-made opalescent glass (not natural opal)
mineral
Opalite
Synthetic Opalized Glass
gemstone
Sea Glass
Man-made silicate glass weathering product
sedimentary
Blue Slag Glass
Anthropogenic Amorphous Silicon Dioxide
mineral
Sea Glass
Man-made vitreous material (silica-based glass)
mineral
Not a geological specimen
N/A (man-made object)
N/A
ABS Plastic (Acrylonitrile Butadiene Styrene)
(C8H8)x·(C4H6)y·(C3H3N)z
Synthetic Polymer (Synthetic Material)
Opalite glass sphere (likely synthetic imitation)
Man-made opalescent glass; not natural opal
mineral
Opalite
Synthetic Glass (SiO2 + impurities)
mineral
Costume Jewelry with Synthetic Gemstones
Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)
mineral
Opalite (Synthetic Opalized Glass)
Synthetic Silicon Dioxide (SiO2) glass
mineral
Diamond
Native Carbon (C)
gemstone
Opalite
Synthetic Glass (Amorphized Silicon Dioxide)
mineraloid
Opalite
Synthetic Glass (Simulated Opal)
mineral
Ring with an Orange Inlay
N/A (Man-made object)
Man-made Object (Ring)
Glass
Amorphous Silicon Dioxide (SiO2)
mineraloid
Cobalt Glass Slug (Cullet)
Man-made Silicate Glass with Cobalt Oxide (CoO)
mineraloid
Not a rock, mineral, or geological specimen
N/A
Opalite
Synthetic Silicon Dioxide (SiO2)
mineral
Small pebble, likely limestone
Unidentified carbonate pebble, possibly micritic limestone (calcite, CaCO₃)
sedimentary
Obsidian
Volcanic Glass
igneous
Aura Quartz (Titanium/Rainbow Quartz)
SiO2 (Silicon Dioxide) with metallic coating
mineral
Opalite
Synthetic opalescent glass
glass
Small rounded mineral pebble, possibly quartz
Uncertain; likely microcrystalline or crystalline SiO₂ (quartz), potentially with iron-oxide staining
mineral
Opalite
Man-made opalescent glass (SiO2 + metal oxides)
mineral (synthetic)
Concrete Fragment
Artificial Conglomerate (Cement and Aggregate)
sedimentary