Metamorphic, Likely Sedimentary With Quartz Veins

Quartzite

Quartzite (primarily SiO2)

Quartz with Chlorite or Hornblende inclusions

Silicon dioxide (SiO2) with phyllosilicate or amphibole inclusions

Quartz

Quartz (SiO2 - Silicon Dioxide)

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Quartz Pebble (Iron-stained)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Yellow Quartz (Citrine-colored Quartz Pebble)

Silicon Dioxide (SiO2)

Banded River Rock / Gneiss (highly weathered)

Gneiss

Banded Chert / Banded Jasper (likely a variety of Chert/Chalcedony)

Chert (microcrystalline quartz)

Quartzite Pebble

Quartzite (primarily SiO2)

Milky Quartz (Water-worn Pebble)

Silicon Dioxide (SiO2)

Milky Quartz with Mineral Inclusions

Quartz (Silicon Dioxide, SiO2)

Chert (often called Flint or River Pebble)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Chalcedony variety)

Microcrystalline Quartz (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

River Pebble (likely Quartzite or Chert)

Silicon Dioxide (SiO2)

Orthoclase Feldspar (Potassium Feldspar)

KAlSi3O8 (Potassium Aluminum Silicate)

Quartz

Silicon Dioxide (SiO2)

Quartz (Pink/Orange Variety)

Silicon Dioxide (SiO2)

Yellow Chert

Sedimentary cryptocrystalline quartz (SiO2)

Gneiss with Quartz Veining

Gneiss (High-grade regional metamorphic rock)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Serpentinite (Commonly known as Serpentine)

Antigorite, Lizardite, or Chrysotile [(Mg,Fe)3Si2O5(OH)4]

Yellow Sapphire or Citrine

Al2O3 (Corundum) or SiO2 (Quartz)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Banded Gneiss

Gneiss (complex metamorphic silicate rock)

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Quartz vein in metamorphic rock

Crystalline Silicon Dioxide (SiO2) in Host Rock

Quartzite with inclusions

Quartzite

River Cobble (Phyllite or Quartzite)

Metasedimentary Rock (often containing SiO2 or KAl2(AlSi3O10)(OH)2)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Quartzite

Quartzite (SiO2)

Quartz (Smoky/Milky Variety)

Silicon Dioxide (SiO2)

Quartz

Quartz (Silicon Dioxide - SiO2)

Chalcedony (Common Agate pebble)

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Jasper with Quartz Druzy

Silicon Dioxide (SiO2)

Quartz Pebble (Chert/Chalcedony)

Silicon Dioxide (SiO2)

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)