Synthetic Glass

Quartz on Matrix

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartzite

Metamorphic Quartz (SiO2)

Sandstone Pebbles

Arenite (primarily SiO2 with mineral cement)

Quartzite

Quartzite (mostly SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite Pebble

Metamorphosed Quartz-rich Sandstone (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartzite Pebble

Quartzite (primarily SiO2)

Limestone Pebble

Sedimentary Calcium Carbonate (CaCO3)

Yellow Quartzite Pitting Pebble

Metamorphic Quartzite (SiO2)

Sandstone

Arenite (SiO2 primarily)

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone

Arenite (SiO2 primarily)

Sandstone

Clastic sedimentary rock (Arenite)

Quartz Grain / Sandstone Fragment

Silicon Dioxide (SiO2)

Clear Quartz (Tumbled)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite

Quartzite (SiO2)

Sandstone

Arenite (SiO2 based)

Quartzite Pebble

Quartzite (SiO2)

Quartz River Pebble

Crystalline Silicon Dioxide (SiO2)

Quartzite Cobble

Metamorphosed Sandstone (SiO2)

Orthoclase Feldspar

KAlSi3O8 (Potassium aluminum silicate)

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone (Red Sandstone)

Arenite (SiO2 based with Fe2O3 staining)

Milky Quartz with Chlorite/Amphibite Inclusions

Silicon Dioxide (SiO2) with various mineral inclusions

Sandstone (Quartzose Sandstone)

Clastic Sedimentary Rock (primarily SiO2)

Red Sandstone

Arenite (Ferruginous Sandstone)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz chunk

Silicon dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz / Quartzite

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)