Mineraloid (Man Made Glass)

Sandstone

Clastic Sedimentary Rock

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone Pebble

Sedimentary Clastic Rock (Quartz Arenite)

Sandstone

Sedimentary Rock (Quartz arenite or arkose)

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone

Quartz Arenite / Sedimentary Rock

Quartz

Silicon Dioxide (SiO2)

Quartz Crystal

Silicon Dioxide (SiO2)

Sandstone

Sedimentary Rock (Quartz arenite)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2) with Hematite/Limonite

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone

Arenite (Sandstone)

White Quartz

Silicon Dioxide (SiO2)

Sandstone

Sedimentary rock composed mainly of quartz sand

Sandstone

Clastic Sedimentary Rock

Feldspar (Plagioclase / Potassium Feldspar)

Feldspar Group (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz on Matrix

Silicon Dioxide (SiO2)

Sand and Gravel (Quartz-rich)

Unconsolidated fluvial/beach sediment (primarily Silica/SiO2)

Sandstone

Arenite (mainly SiO2 with varying cements)

Sandstone

Arenite (SiO2 principal)

Sandstone

Arenite (SiO2 based)

Sandstone (with Chert/Quartzite)

Arenite (SiO2 primarily)

Quartz

Silicon Dioxide (SiO2)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone

Arenite (primarily SiO2)

Quartzite River Rock

Quartzite (SiO2)

Sandstone

Arenite (primarily SiO2)

Quartz (Iron-Stained)

Crystalline Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Red Sandstone

Arenite (Ferruginous Sandstone)

Sandstone

Arenite (primarily SiO2)

Quartzite Pebble

Metamorphic Quartzite (primarily SiO2)

Sandstone

Arenite (primarily SiO2)

Quartz pebble

Silicon Dioxide (SiO2)