Sea Glass
Man-made silicate glass
sedimentary
Category
Antropogenic (Man Made Glass Byproduct)
Browse antropogenic (man made glass byproduct) specimens identified by the Rock Identifier community.
Learn about Antropogenic (Man Made Glass Byproduct) in the encyclopedia
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Small black stone fragment (possibly obsidian)
Unidentified dark rock; obsidian is volcanic glass (composition typically rhyolitic)
igneous
Obsidian
Volcanic Glass
igneous
Sea Glass
Man-made silicate glass
gemstone
Opalite
Man-made opalescent glass
gemstone
Obsidian
Volcanic Glass
igneous
Opalite
Synthetic Opalite Glass / Opalized Glass
gemstone
Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)
Silicon Dioxide (SiO2) with inclusions/dye
gemstone
Blue Obsidian
Volcanic Glass (Amorphous)
gemstone
Blue crystal pendant (likely blue glass or synthetic crystal)
Not identifiable from the image; possibly synthetic quartz or glass, rather than a natural mineral
gemstone
Sea Glass
Silicon dioxide (mostly)
mineral
Blue opalescent glass-like gemstone (possibly imitation opalite)
Likely man-made opalite glass; composition varies, typically silica-based glass
gemstone
Sea Glass
Man-made vitreous material
mineral
Sea Glass
Man-made vitreous material
gemstone
Ferruginous Slag (Iron Smelting Byproduct)
Fused Silicate Scoria (Amorphous mixture of FeO, SiO2, and CaO)
Antropogenic Glass / Mineraloid
Cullet Glass (Strawberry Glass)
Amorphous Silicon Dioxide (SiO2) with metallic dopants
Mineraloid (Synthetic/Man-made)
Opalite
Synthetic Opalite (Man-made glass)
mineral
Goldstone
Man-made glass with copper inclusions
gemstone
Green Slag Glass
Cullet (Amorphous Silicon Dioxide with impurities)
Man-made rock-like material
Quartz pebble (Quartztite fragment)
Silicon Dioxide (SiO2)
mineral
Opalite (Synthetic Moonstone/Opal)
Synthetic Silica Glass
mineraloid (synthetic)
Goldstone
Man-made glass with copper inclusions
mineral
Obsidian
Volcanic glass
igneous
Metal Chain Belt with Square Plates
Not applicable (man-made)
Man-made Object (Metalwork)
Blue Slag Glass
Ferro-silicate glass (Slag)
igneous (man-made/industrial)
Faceted clear gemstone in a gold-colored setting
Unidentified transparent faceted stone; possibly quartz, glass, or another colorless gem
gemstone
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
Opalite
Synthetic Glass (Simulated Opal)
gemstone
Opalite
Man-made Glass (SiO2 + additives)
mineraloid (synthetic)
Opalite
Man-made Glass (Synthetic Opalized Glass)
mineral
Green Sea Glass
Man-made silicate glass (weathered)
sedimentary
Sea Glass
Amorphous silicon dioxide (Man-made glass weathered by wave action)
sedimentary
Tumbled black stone, likely black obsidian
Obsidian (volcanic glass; chiefly silica-rich rhyolitic composition)
igneous
Opalite
Man-made Opalized Glass (Synthetic Glass)
gemstone
Opalite
Synthetic Glass (Silica-based)
gemstone
Opaline Glass (Opalite)
Synthetic Silicon Dioxide Glass
Mineraloid (Man-made)
Polished blue glassy mineral specimen, likely sodalite or blue aventurine
Most consistent with sodalite (Na₈Al₆Si₆O₂₄Cl₂), though dyed quartzite or blue glass cannot be excluded from the photograph
mineral
Opalite Egg
Synthetic Glass (Simulated Opal)
mineral
Opalite
Synthetic Glass (Simulated Opal)
gemstone
Tumbled Clear Quartz/Rock Crystal
Silicon Dioxide (SiO2)
mineral
One Pound Coin (UK)
Nickel-Brass Alloy (Cu-Zn-Ni)
mineral