Black Obsidian
Volcanic Glass (Silicon Dioxide with impurities)
Category
Browse mineral simulant (synthetic glass) specimens identified by the Rock Identifier community.
Black Obsidian
Volcanic Glass (Silicon Dioxide with impurities)
Green Aventurine
SiO2 (Silicon Dioxide with inclusions of Fuchsite)
Black Obsidian
Obsidian (Volcanic Glass, SiO2 + impurities)
Aventurine Quartz
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
Obsidian
Volcanic glass (high silica SiO2)
Obsidian
Obsidian (volcanic glass), predominantly Silicon Dioxide (SiO2)
Granodiorite (or Granite) Pebble
Phaneritic Felsic Igneous Pebble
Green Aventurine
Silicon Dioxide (SiO2+KAl2(AlSi3O10)(OH)2)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Chert (Flint variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Quartz Geode Fragment with Iron Staining
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz (River Pebble)
Silicon Dioxide (SiO2)
Polished serpentine
Serpentine-group minerals, chiefly lizardite and/or antigorite; approximate formula Mg₃Si₂O₅(OH)₄
Quartz (Clear Quartz)
Silicon Dioxide (SiO2)
Sandstone
Sedimentary rock composed mainly of quartz sand
Obsidian
Volcanic Glass (SiO2)
Obsidian
Volcanic Glass (Amorphous Silica)
Sandstone with Iron Staining
Clastic sedimentary rock (SiO2 with iron oxides)
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz, SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz Pebble (Sea Glass-like Quartz)
Quartz (Silicon Dioxide - SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Obsidian
Amorphous volcanic glass (SiO2)
Polished green aventurine
Quartzite or quartz-rich rock containing fuchsite mica; mainly SiO₂
Sandstone
Arenite
Quartz
Silicon Dioxide (SiO2)
Slag Glass
Amorphous Silica Glass (with metal oxide inclusions)
Sandstone
Clastic sedimentary rock
Sandstone
Sedimentary Rock (Quartz arenite)
Clear Quartz
Silicon Dioxide (SiO2)
Sandstone Pebble
Sandstone (primarily SiO2)
Sandstone
Arenite (SiO2 principal)
Chert (specifically Flint or Jasper variant)
Microcrystalline Quartz (SiO2)
Sandstone
Arenite (primarily SiO2)
Milky Quartz with Mineral Inclusions
Quartz (Silicon Dioxide, SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace impurities of titanium, iron, or manganese
Milky Quartz Pebble with Matrix
Quartz (Silicon Dioxide, SiO2)