Sandstone
Sedimentary Rock (Quartz arenite/Arkose)
Category
Browse mineral simulant (synthetic glass) specimens identified by the Rock Identifier community.
Sandstone
Sedimentary Rock (Quartz arenite/Arkose)
Mixed Mineral Collection
Multi-mineral Assemblage (Quartz, Jasper, Obsidian, Pyrite, etc.)
Sandstone
Arenite (SiO2 based)
Chalcedony (possibly agate or common quartz)
Microcrystalline quartz, SiO₂
Quartz Pebble (Iron-Stained Quartz)
Silicon Dioxide (SiO2)
Rose Quartz
Quartz (Silicon Dioxide, SiO2)
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
Green Slag Glass
Amorphous Silica / Glassy Blast Furnace Slag
Obsidian
Volcanic Glass (SiO2)
Obsidian
Obsidian (Volcanic Glass)
Black Obsidian
Volcanic Glass (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Smoky Quartz (with Iron Inclusions)
Silicon Dioxide (SiO2)
Pink Quartz / Rose Quartz
Silicon Dioxide (SiO2)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium, Manganese, or Iron
Fluorite
Calcium fluoride (CaF2)
Sandstone
Arenite
Obsidian
Volcanic Glass (SiO2 rich)
Obsidian
Volcanic Glass (SiO2)
Quartz
Silicon Dioxide (SiO2)
Slag (Industrial Glass Slag)
Amorphous Silica / Ferro-silicate Slag
Quartz with Spessartine Garnet and Iron Staining
Silicon Dioxide (SiO2) with Almandine-Spessartine (Mn3Al2(SiO4)3)
Sandstone
Clastic sedimentary rock
Quartz Crystal
Silicon Dioxide (SiO2)
Fulgurite
Fulgurite (Lechatelierite)
Quartz (Milky/Gravel variety)
Silicon Dioxide (SiO2)
Quartz (specifically Milky Quartz Pebble)
Silicon Dioxide (SiO2)
Pale blue-gray quartz-rich pebble (tentative)
Quartz, SiO₂, possibly chalcedony or a weathered metamorphic fragment
Green Aventurine
Quartz (SiO2) with fuchsite inclusions
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Raw greenish-blue quartz-bearing mineral specimen
Likely fluorite or chalcedony/quartz; exact identification requires hardness and crystal tests
Dragon's Breath (Mexican Opal Glass)
Artisan Foil Glass (SiO2 based)
Quartz
Silicon Dioxide (SiO2)
Aventurine (Green Quartz)
Silicon dioxide with inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
Obsidian with Slate/Tuff
Volcanic glass (SiO2) with associated pyroclastic rock
Obsidian
Volcanic glass (SiO2 - Silicon Dioxide with impurities)
Obsidian
Obsidian (Volcanic Glass) SiO2 (70% or more)
Obsidian
Volcanic glass (SiO2 - Silicon Dioxide with impurities)
Amethyst
Quartz (SiO2)
Quartz
Silicon Dioxide (SiO2)