Synthetic (Ceramic)

Granite Pegmatite

Granitic Pegmatite (composition: SiO2 with KAlSi3O8)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartzite (Iron-stained)

Quartzite (SiO2 with Fe2O3 staining)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Orthoclase Feldspar

Potassium aluminum silicate (KAlSi3O8)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Milk Quartz (Vein Quartz)

Quartz (Silicon Dioxide, SiO2)

Quartzite

Quartzite (SiO2)

Tumbled quartz pebble

Quartz (SiO₂), likely milky or iron-stained quartz

Likely weathered quartz-rich rock, possibly smoky quartz or chert

Quartz (SiO₂), though exact identification is uncertain from the photograph

Milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Milky quartz (likely quartz fragment)

Quartz, silicon dioxide (SiO₂)

Likely weathered quartz-rich stone

Probably quartz-bearing sandstone or milky quartz; exact identification requires testing

Polished brown mineral fragment, likely quartz-rich iron-stained material

Possibly quartz (SiO₂) with iron-oxide inclusions; exact identification is uncertain from the image

Flint

Silicon dioxide (Microcrystalline quartz, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Milky Quartz / Quartzite)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartzite

Metamorphic rock predominantly composed of Quartz (SiO2)

Quartzite (with Iron Staining)

Metamorphosed Quartz Sandstone (SiO2)

Quartz Geode or Druzy Quartz in Host Rock

Silicon Dioxide (SiO2)

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silica - SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Quartzite (Tumbled Pebble)

Quartzite (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Quartzite)

Silicon Dioxide (SiO2)

Quartz heart (likely milky/included quartz)

Quartz, silicon dioxide (SiO₂)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)