Manufactured Glass

Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite Pebble

Metamorphosed Quartz-rich Sandstone (SiO2)

Quartzite Pebble

Metamorphic Quartzite (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite Pebble

Quartzite (primarily SiO2)

Limestone Pebble

Sedimentary Calcium Carbonate (CaCO3)

Sandstone

Arenite (SiO2 primarily)

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartz Grain / Sandstone Fragment

Silicon Dioxide (SiO2)

Clear Quartz (Tumbled)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite

Quartzite (SiO2)

Sandstone

Arenite (SiO2 based)

Quartzite Pebble

Quartzite (SiO2)

Microcline Feldspar

KAlSi3O8

Sandstone

Sedimentary Rock (Quartz arenite)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone

Sandstone (SiO2 rich)

Clear Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone

Arenite (SiO2 based)

Quartz on Matrix

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartzite

Metamorphic Quartz (SiO2)

Quartz (Raw Crystal)

Silicon Dioxide (SiO2)

Lepidolite

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

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Sandstone

Clastic sedimentary rock (Quartz arenite or arkose)

Quartz Pebble

Silicon Dioxide (SiO2)

Sand

Siliciclastic sediment / Quartz sand (SiO2)

Sandstone

Sedimentary Rock (Quartz arenite/Arkosic sandstone)

Quartzite Cobble

Metamorphosed Sandstone (SiO2)

Orthoclase Feldspar

KAlSi3O8 (Potassium aluminum silicate)

Sandstone (Red Sandstone)

Arenite (SiO2 based with Fe2O3 staining)

Milky Quartz with Chlorite/Amphibite Inclusions

Silicon Dioxide (SiO2) with various mineral inclusions

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz / Quartzite

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Sandstone

Arenite (SiO2 predominantly)