Manufactured Glass (Simulant)

Quartz / Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Sandstone (likely Arkosic or Quartzose)

Sandstone (SiO2 dominated)

Sandstone

Arenite (SiO2 based)

Quartzite

Quartzite (containing SiO2)

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite Pebble

Metamorphic Quartz (SiO2)

Quartz

Silicon Dioxide (SiO2)

Sandstone

Arenite (SiO2 based)

Sandstone (Ferruginous)

Sandstone (primarily SiO2 with iron oxide cement Fe2O3)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Sandstone

Arenite (primarily SiO2)

Sandstone

Arenite (SiO2 based)

Quartzite Pebble

Quartzite (chiefly SiO2)

Sandstone

Arenite (primarily SiO2)

Quartz (Clear/White)

Silicon Dioxide (SiO2)

Sandstone

Arenite

Quartz

Silicon Dioxide (SiO2)

Quartz (Citrine or Iron-Stained)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Sandstone (Tafoni Weathered)

Arenite (part of the Sandstone family)

Sandstone (Red Sandstone)

Arenite (primarily Quartz with Hematite cement)

Sandstone (Ferruginous)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)

Sandstone (Ferruginous)

Sandstone (primarily SiO2 with Iron Oxide cement)

Quartz

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Arenite (Fe-rich)

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone

Arenite (primarily SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Clear Quartz

Quartz (Silicon Dioxide - SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone (with potential iron-oxide staining)

Arenite (primarily SiO2)

Sandstone

Arenite (Silicon Dioxide, SiO2 based)

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Quartzose Sandstone)

Arenite (primarily SiO2)

Quartz (Quarzite or Massive Quartz vein)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon dioxide (SiO2)

Lepidolite on Pegmatite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) in Granitic Pegmatite