Man Made Glass

Sandstone

Arenite

Sandstone (Quartz Arenite)

Sandstone (SiO2 with possible mineral cements)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Clear/White)

Silicon Dioxide (SiO2)

Sandstone

Arenite

Sandstone (likely Quartzose type)

Clastic sedimentary rock (primarily SiO2)

Sandstone (with Iron Staining)

Clastic sedimentary rock (SiO2 with Fe2O3 impurities)

Quartzite

Quartzite (SiO2)

Sandstone (Quartz Arenite)

Sandstone (Chemical formula: primarily SiO2)

Quartzite

Quartzite (SiO2)

Sandstone (Quartzose Sandstone)

Arenite (SiO2 primarily)

Sandstone (likely Quartzite-rich)

Arenite (primarily SiO2)

Quartzite

Quartzite (primarily Silicon Dioxide, SiO2)

Sandstone (Quartzose)

Arenite (predominantly SiO2)

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Sandstone (Weathered)

Arenite (primarily SiO2)

Sandstone

Arenite

Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Potassium Feldspar

Orthoclase (KAlSi3O8)

Sandstone

Arenite (composed primarily of SiO2)

Orthoclase Feldspar

Potassium aluminum silicate (KAlSi3O8)

Quartzite

Quartzite (composed primarily of SiO2)

Rough Quartz (likely Rose or Smoky variant)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone (specifically Lithic or Quartz Arenite)

Arenite (composed primarily of SiO2)

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Sandstone

Arenite (primarily SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Sandstone (likely Arkosic)

Clastic Sedimentary Rock (primarily SiO2 with Feldspar)

Milky Quartz

Silicon Dioxide (SiO2)

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

Quartzite

Quartzite (principally SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Chert (and Flint variant)

Chert (SiO2)

Sandstone (Ferruginous)

Arenite with Iron Oxide matrix

Clear Quartz

Quartz (Silicon Dioxide - SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone (Iron-stained)

Arenite (primarily Quartz, SiO2)

Potassium Feldspar

K-Feldspar (KAlSi3O8)

Sandstone

Arenite (primarily SiO2)