Manufactured Glass (Simulant)

Sandstone

Sedimentary Rock (Quartz arenite)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Geode or Vein Quartz

Silicon Dioxide (SiO2)

Sandstone

Clastic Sedimentary Rock

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Sandstone

Quartz Arenite / Clastic Sedimentary Rock

Quartz Pebble

Silicon Dioxide (SiO2)

White Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite Pebble

Metamorphic Quartzite (SiO2)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide - SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartzite Pebbles

Quartzite (SiO2)

Quartz (Druzy)

Silicon Dioxide (SiO2)

Sandstone

Arenite

Quartzite Pebble

Quartzite (primarily SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Quartzite Pebble

Metamorphic Quartzite (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Sandstone (Quartzose)

Arenite (SiO2 based)

Sandstone (Quartzose Sandstone Pebble)

Arenite (primarily SiO2)

Sandstone (Stream Pebble)

Arenite (primarily SiO2)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2)

Potassium Feldspar and Quartz

KAlSi3O8 (Potassium Feldspar) and SiO2 (Quartz)

Sandstone (Quartzose Pebble)

Arenite (composed primarily of SiO2)

Quartz (with Iron staining)

Silicon Dioxide (SiO2)

Quartz (Smoky/Milky variety)

Silicon Dioxide (SiO2)

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

Sandstone

Sandstone (Sedimentary rock composed of silicate grains)

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Smoky/Milky variant)

Silicon Dioxide (SiO2)

Sandstone

Arenite (SiO2 based)

Quartz on Matrix

Silicon Dioxide (SiO2)

Sandstone

Arenite (SiO2 based)

Sandstone

Arenite (SiO2 based)

Sandstone (Quartzite-rich Pebble)

Arenite (primarily SiO2)

Sandstone

Arenite (SiO2 predominantly)

Sandstone (Quartz-rich)

Arenite