Blue Goldstone
Aventurine Glass (Silicon Dioxide with metal inclusions)
man-made glass mineral simulant
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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Diamond (or Diamond Simulant)
Carbon (C) or Cubic Zirconia (ZrO2)
gemstone
Pumice
Pumice (Vitreous volcanic rock)
igneous
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Blue glass-like tumbled specimen
Most likely cobalt-blue slag glass or manufactured glass; not confidently identifiable as a natural mineral from the image
mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert
Silicon dioxide (SiO2)
Sedimentary
Red gemstone ring, likely garnet or synthetic ruby
Possibly almandine garnet (Fe₃Al₂(SiO₄)₃) or corundum/ruby (Al₂O₃); image alone cannot distinguish
gemstone
Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
metamorphic
Sea Glass (Uranium/Vaseline Glass variant)
Silicon Dioxide (SiO2) with trace Uranium Oxide (U3O8)
man-made silicate (anthropogenic glass)
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chipped Glass/Plastic Fragment
Silicon dioxide (SiO2) for glass (amorphous) or various polymer compounds for plastic
Man-made material (simulant/artifact)
Rough Sapphire (Corundum)
Corundum (Al2O3)
mineral
Quartzite
Metamorphic Quartz Sandstone
metamorphic
Chert / Jasper
Silicon Dioxide (SiO₂)
sedimentary
Faceted Glass (Costume Jewelry)
Amorphous Silicon Dioxide with colorants (Glass)
Synthetic/Man-made Material
Goldstone (Synthetic Aventurescence Glass)
Cuprous Aventurescent Glass (Silicon Dioxide with Copper inclusions)
mineraloid / man-made material
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Flint
SiO2 (Cryptocrystalline Quartz)
sedimentary
Malaysian 50 Sen Coin
Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)
Man-made object (coin)
Goldstone
Aventurine Glass (SiO2 + Cu small inclusions)
man-made glass mineral simulant
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Black Chert River Stone
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint / Quartz Nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Artificial Rock Face (Faux Rock)
Glass Fiber Reinforced Concrete (GFRC)
man-made/construction material
Blue opalite (often sold as synthetic opal)
Opalite glass; amorphous hydrated silica if natural opal (SiO₂·nH₂O)
gemstone
Chert (varietal: Flint/Jasper)
Silicon Dioxide (SiO2)
sedimentary
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Chert or Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Blue Goldstone
Aventurine Glass
Man-made mineral simulant (Glass)
Snowflake Obsidian
Volcanic glass with Cristobalite inclusions (70–75% SiO2)
igneous
Obsidian
Volcanic Glass (Amorphous Silicon Dioxide)
igneous
Quartzite
Metamorphic Rock (Mainly SiO2)
metamorphic
Obsidian (Black)
Obsidian (High-silica volcanic glass)
igneous
Obsidian
Volcanic glass
igneous
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Pearl
Biogenic CaCO3 (Aragonite and Calcite)
mineral
Sea Glass (Kelly Green)
Amorphous Silica (Silicon Dioxide with Iron/Chromium additives)
Anthropogenic specimen (Man-made material)
Precious Coral (Red Coral)
Corallium rubrum (Calcium Carbonate, CaCO3)
mineral
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Probable amber fragment
Amber (fossilized plant resin; chiefly amorphous organic resin, commonly dominated by succinite)
gemstone