Green Obsidian Sphere (man-made glass)
Vitreous Silica with Chromium/Iron additives
mineralogical simulant
Category
Man Made Glass (Not A Natural Rock Or Mineral)
Browse man made glass (not a natural rock or mineral) specimens identified by the Rock Identifier community.
Learn about Man Made Glass (Not A Natural Rock Or Mineral) in the encyclopedia
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Small rough mineral/rock specimen (not confidently identifiable)
Undetermined; image detail is insufficient for a reliable identification
mineral
Opalite
Synthetic glass (SiO2 + impurities)
mineral
Goldstone (brown goldstone)
Man-made aventurine glass, typically copper-bearing silica glass
gemstone
Blue Goldstone
Man-made glass infused with copper crystals
mineral
Red goldstone beads
Goldstone (man-made copper-bearing glass; not a natural mineral)
gemstone
Sea Glass
Man-made silicate glass
mineral
Red glassy gemstone, possibly garnet
Unidentified red transparent material; garnet group (X₃Y₂(SiO₄)₃) is a possibility
gemstone
Tumbled milky quartz
Quartz (SiO₂), cryptocrystalline-to-massive variety
mineral
Chipped Glass/Plastic Fragment
Silicon dioxide (SiO2) for glass (amorphous) or various polymer compounds for plastic
Man-made material (simulant/artifact)
Blue-green faceted gemstone, possibly glass or synthetic material
Not identifiable from the image; possible synthetic spinel or glass
gemstone
Dragon's Breath (Mexican Opal Glass)
Artisan Foil Glass (SiO2 based)
mineraloid
Cullet Glass / Slag Glass
Amorphous silica glass
man-made glass / industrial byproduct
Opalite
Synthetic glass / Opaque silicious glass
gemstone
Faceted clear gemstone in a gold-colored setting
Unidentified transparent faceted stone; possibly quartz, glass, or another colorless gem
gemstone
Opalite
Man-made opalescent glass
gemstone
Tumbled opalite (likely man-made glass)
Opalite glass; a synthetic opalescent glass, not a natural mineral species
mineral
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (SiO2) with metallic oxide impurities
mineraloid
Asphalt Concrete (Bituminous Conglomerate)
Anthropogenic Bituminous Conglomerate
sedimentary
Blue Obsidian (Cullet Glass)
Silicon Dioxide (Amorphous Glass)
mineral
Opalite (Man-made Glass)
Synthetic Silicon Dioxide Glass (SiO2 + metal oxides)
Synthetic Mineral Simulant / Glass
Goldstone
Aventurine Glass (Man-made)
mineral
Asphalt Concrete
Bituminous conglomerate
sedimentary
Purple glassy pebble, possibly slag glass
Unidentified; likely man-made glass rather than a natural mineral
mineral
Opalite
Synthetic Opalized Glass
gemstone
Opalite
Man-made Glass (SiO2 + additives)
mineraloid (synthetic)
Sea Glass
Man-made silicate glass
sedimentary
ABS Plastic (Acrylonitrile Butadiene Styrene)
(C8H8)x·(C4H6)y·(C3H3N)z
Synthetic Polymer (Synthetic Material)
Black Obsidian
Amorphous volcanic glass (SiO2 + impurities)
igneous
Cobalt Blue Glass / Cullet Glass
Silicon dioxide (Amorphous man-made glass)
mineral
Opalite
Synthetic Opalite Glass
mineraloid (man-made)
Asphalt (Road Aggregate)
Asphalt concrete / Bituminous mixture
anthropogenic sedimentary (technolith)
Unidentifiable Rock Fragment
Uncertain
Opalite
Synthetic Glass (Simulated Opal)
gemstone
Tumbled clear quartz (rock crystal)
Quartz, silicon dioxide (SiO₂)
mineral
Green sea glass (likely bottle glass)
Man-made soda–lime silicate glass; not a natural mineral
mineral
Blue Obsidian
Volcanic Glass (Amorphous)
gemstone
White sea glass (naturally frosted glass fragment)
Man-made silicate glass, typically soda-lime glass; not a mineral or rock
mineral
Clear quartz tumbled stone
Quartz (silicon dioxide, SiO₂)
mineral
Concrete Paver (Artificial Cementitious Rock)
Hydrated Portland Cement Aggregate
Sedimentary (Synthetic)
Opalite
Synthetic Opalized Glass / Man-made Glass
gemstone
Red Slag Glass
Amorphous Silica (Industrial byproduct with metallic oxide dopants)
Mineraloid / Industrial Byproduct