Goldstone
Avventurina (Man-made Glass with Copper inclusions)
mineral
Category
Man Made Silicate (Anthropogenic Glass)
Browse man made silicate (anthropogenic glass) specimens identified by the Rock Identifier community.
Learn about Man Made Silicate (Anthropogenic Glass) in the encyclopedia
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Asphalt Chunk (with aggregate)
Bituminous concrete / Anthropogenic conglomerate
sedimentary (anthropogenic/man-made conglomerate)
Ferruginous Slag (Iron Smelting Byproduct)
Anthropogenic Vitreous Silicate (often containing Fayalite: Fe2SiO4)
Mineraloid/Anthropogenic (Technofossil)
Industrial Slag
Anthropogenic Vitreous Slag
igneous
Opalite
Synthetic Silicon Dioxide (SiO2)
mineral
Synthetic Costume Accessory (Non-Geological)
Polyester and Acrylic Fiber (Anthropogenic polymer)
Synthetic / Man-made textile
Opalite (Synthetic Moonstone/Sea Opal)
Silicon Dioxide (SiO2) glass with metallic inclusions
Synthetic/Man-made Glass
Green Aventurine
SiO2 (Silicon Dioxide with Fuchsite inclusions)
mineral
Pink Quartz / Sea Glass
Silicon Dioxide (SiO2)
mineral
Small pebble, likely limestone
Unidentified carbonate pebble, possibly micritic limestone (calcite, CaCO₃)
sedimentary
Opalite
Synthetic opalescent glass
glass
Polished milky quartz (likely quartz worry stone or wand)
Quartz, silicon dioxide (SiO₂)
mineral
White quartz pebble
Quartz (SiO₂), likely milky quartz
mineral
Polished black pebble, likely basalt
Basalt, a fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, commonly with olivine
igneous
Aventurine Quartz
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Small rounded mineral pebble, possibly quartz
Uncertain; likely microcrystalline or crystalline SiO₂ (quartz), potentially with iron-oxide staining
mineral
Opalite (Man-made Glass)
Synthetic Opalised Glass
mineral
Green glass-like mineral specimen, likely fluorite
Fluorite (calcium fluoride, CaF₂), if natural; appearance may also indicate colored glass
mineral
Aura Quartz (Titanium/Rainbow Quartz)
SiO2 (Silicon Dioxide) with metallic coating
mineral
Slag Glass
SiO2 (Silicon Dioxide) with impurities
man-made glass
Opalite
Synthetic Glass (Hydrated Silica Simulant)
mineral
Goldstone
Aventurine glass (Synthetic glass with copper inclusions)
mineraloid / man-made glass
Silicon Carbide (Carborundum)
Silicon Carbide (SiC) / Moissanite (natural)
mineral
Goldstone (Brown/Gold)
Aventurine Glass (Man-made glass with Copper inclusions)
gemstone
Goldstone
Aventurine Glass (Man-made glass with copper inclusions)
mineraloid / man-made glass
Eroded Brick or Pumice-like Scoria
Vesicular Basalt / Scoria (Anthropogenic variant: Eroded Firebrick)
igneous
Opalite
Synthetic Opalized Glass (SiO2 + additives)
mineraloid (man-made)
Opalite
Synthetic Opalite Glass
mineraloid (man-made)
Orange glassy slag (industrial by-product)
Iron-rich silicate glass; composition varies, commonly Fe–Ca–Al silicate
mineral
Tumbled quartz pebble
Quartz, silicon dioxide (SiO₂), likely milky quartz
mineral
Diamond (or Simulant)
Carbon (C)
gemstone
Opalite
Synthetic Opalised Glass
mineral
Milky quartz (rough quartz fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Chert Arrowhead
Cryptocrystalline Quartz (SiO2)
sedimentary
Blue Slag Glass
Ferro-silicate glass (Slag)
igneous (man-made/industrial)
Synthetic Faux Fur Fursuit
Polyacrylonitrile / Polyester (Synthetic Textile)
not a rock (synthetic material/costume)
Opalite
Synthetic Fluorescent Glass (SiO2 + impurities)
mineraloid (synthetic)
Opalite (likely imitation opal glass)
Man-made opalescent glass; not a natural mineral (often sold as opalite)
mineral
Opalite
Man-made opalescent glass (SiO2 + metal oxides)
mineral (synthetic)
Polished black stone, likely black obsidian
Volcanic glass; predominantly rhyolitic silica glass (SiO₂-rich)
igneous
White quartz pebble or chip
Quartz (silicon dioxide, SiO₂), possibly milky quartz
mineral
Unidentified translucent crystal/mineral fragment
Likely quartz (SiO₂), but visual identification is uncertain
mineral