Mineral Simulant (Synthetic Glass)

Milky Quartz

Silicon Dioxide (SiO2)

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing mica)

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone

Arenite

Mahogany Obsidian

Volcanic Glass (SiO2 + Fe2O3)

Sandstone

Arenite (SiO2 primarily)

Sandstone

Arenite (primarily SiO2)

Milky Quartz with Country Rock contact

Silicon Dioxide (SiO2) in contact with Metamorphic/Igneous rock

Sandstone (Red Sandstone / River Stone)

Arenite (composed primarily of Quartz, SiO2, with Iron Oxide cementation)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Aquamarine

Beryl (Be3Al2Si6O18 with trace Fe2+)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Milky or Cloudy variety)

Quartz (Silicon Dioxide, SiO2)

Aventurine

Aventurine Quartz (SiO2 with inclusions)

Quartz Pebble (Milky Quartz)

Silicon Dioxide (SiO2)

Smoky Quartz (Polished)

Silicon Dioxide (SiO2)

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)

Sandstone (Calcareous Sandstone)

Calcareous Sandstone (primarily SiO2 with CaCO3 cement)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Quartz / Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Citrine or Iron-Stained)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz Crystal

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Chalcedony (Yellow Agate)

Cryptocrystalline Quartz (SiO2)

Moldavite

Tektite (Impact Glass), ~80% SiO2 + Al2O3

Clear Quartz

Silicon Dioxide (SiO2)

Green Aventurine

Quartz with Fuchsine inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Green Aventurine

Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Chalcedony (Common Opal variant or Chert/Flint)

Silicon Dioxide (SiO2)

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Quartz (Rock Crystal)

Quartz (SiO₂ - Silicon Dioxide)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Libyan Desert Glass

Tektite (high-silica impact glass), SiO2

Milky Quartz with inclusions

Silicon Dioxide (SiO2)

Slag

Anthropogenic Iron Silicate Glass