Orthoclase Feldspar
K(AlSi3O8)
mineral
Category
Man Made Glass
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Quartzite Pebble
Metamorphic Quartzite (SiO2)
metamorphic
Potassium Feldspar
K-Feldspar (Orthoclase/Microcline) KAlSi3O8
mineral
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
sedimentary
Quartzite (Iron-stained River Rock)
Metamorphic Rock consisting primarily of Quartz (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartzite
Metamorphosed Sandstone (primarily SiO2)
metamorphic
Sandstone
Arenite (SiO2 primarily)
sedimentary
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (mostly SiO2)
metamorphic
Sandstone
Arenite (SiO2 primarily)
sedimentary
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Quartz pebble
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (principally SiO2)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral
Sandstone (Red)
Arenite (primarily Quartz, SiO2, with Iron Oxide cement)
sedimentary
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Sandstone (Water-worn Pebble)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Bull Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (composed primarily of Quartz, SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (SiO2 based)
sedimentary
Quartzite
Quartzite (mostly SiO2)
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (typically SiO2 + others)
sedimentary
Sandstone
Arenite (Sedimentary Rock)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone (Quartzite Pebble)
Arenite (primarily SiO2)
sedimentary
Sandstone (likely Quartz Sandstone)
Arenite (SiO2 based)
sedimentary
Quartzite Pebble
Metamorphic Quartzite (SiO2)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Celestine (or Celestite) on Matrix
Celestine (SrSO4)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (specifically Red Sandstone)
Arenite (primarily Quartz, SiO2)
sedimentary
Sandstone
Clastic Sedimentary Rock (composed mostly of SiO2)
sedimentary
Feldspar (likely Amazonite or Plagioclase)
Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate
mineral
Potassium Feldspar (Orthoclase)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral