Obsidian
Volcanic Glass (SiO2 + impurities)
Category
Browse mineral simulant (synthetic glass) specimens identified by the Rock Identifier community.
Obsidian
Volcanic Glass (SiO2 + impurities)
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Orthoclase Feldspar
Potassium aluminum silicate (KAlSi3O8)
Dumortierite Quartz
Al7BO3(SiO4)3O3 (Borosilicate mineral/Quartz inclusion)
Sandstone
Arenite (primarily SiO2)
Tumbled Green Jasper
Silicon Dioxide (SiO2) with mineral inclusions
Black Sapphire (Basaltic Blue Sapphire)
Corundum (Al2O3)
White Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
Sandstone
Arenite
Sandstone (Ferruginous)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)
Orthoclase Feldspar
Orthoclase (KAlSi₃O₈)
Sandstone (Quartzose)
Arenite (SiO2 based)
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
Sandstone
Arenite (primarily SiO2)
Quartz
Silicon Dioxide (SiO2)
Milky Quartz Vein with Iron Staining
Silicon Dioxide (SiO2)
Quartz Geode (Cracked)
Quartz (Silicon Dioxide, SiO2)
Celestite (Celestine)
Strontium sulfate (SrSO4)
Yellow Aventurine
Silicon Dioxide with inclusions (SiO2 + Muscovite/Fuchsite)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Aventurine
Quartz (SiO2) with inclusions of Fuchsite
Obsidian
Volcanic Glass (Amorphous Silica)
Sandstone (Ferruginous)
Arenite (Fe-rich)
Quartz (Citrine or Smoky variant)
Silicon Dioxide (SiO2)
Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
Chert (often found as Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Quartz (specifically Clear Quartz or Rock Crystal)
Silicon Dioxide (SiO2)
Milky Quartz (Common Quartz)
Quartz (Silicon Dioxide, SiO2)
Rose Quartz
Silicon Dioxide with traces of Titanium, Iron, or Manganese (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz (Micro-specimen)
Silicon Dioxide (SiO2)
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 oxides)
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
Obsidian
Volcanic Glass (Amorphous Silica)
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Snowflake Obsidian
Obsidian with Cristobalite inclusions (Amorphous SiO2 + SiO2 inclusions)
Blue Quartzite
Quartzite (silicon dioxide, SiO2)
Quartz (River Pebble)
Silicon Dioxide (SiO2)
Quartz (River Pebble)
Silicon Dioxide (SiO2)