Manufactured Glass (Simulant)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Common or Milky)

Silicon Dioxide (SiO2)

Sandstone (Calcareous or Ferruginous)

Clastic sedimentary rock (SiO2 with CaCO3 or Fe2O3 cement)

Feldspar (likely Amazonite or Plagioclase)

Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Quartzite

Quartzite (SiO2)

Sandstone (likely Quartzose Sandstone)

Arenite (composed primarily of SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone

Arenite (Sedimentary rock composed of sand-sized minerals or rock grains)

Quartzite

Quartzite (SiO2)

Sandstone

Arenite (primarily SiO2)

Sandstone (with potential iron mineralization)

Arenite

Sandstone

Arenite (SiO2 based typically)

Quartzite

Quartzite (chiefly SiO2)

Quartz (Milky or Cloudy)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Sandstone

Arenite

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Red Sandstone

Arenite (Ferruginous Sandstone)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartzwacke / Impure Sandstone

Arenite with minor lithic fragments (Silicon Dioxide matrix)

Sandstone

Arenite (SiO2 principal component)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Quartzite Pebbles

Quartzite (SiO2)

Sandstone

Arenite (Sedimentary rock composed of sand-sized grains)

Quartzite

Quartzite (SiO2)

Quartzite Pebble

Quartzite (principally Silicon Dioxide, SiO2)

Sandstone (Quartz-rich)

Arenite (primarily SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Feldspar (specifically Orthoclase)

Potassium Aluminum Silicate (KAlSi3O8)

Quartzite Pebble

Quartzite (primarily SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Opalite

Man-made Glass (Synthetic Opalized Glass)

White Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz with inclusions

Silicon Dioxide (SiO2)

Quartz Cluster (Likely Ferruginous)

Silicon Dioxide (SiO2)