Synthetic (Ceramic)

Milky Quartz (or Bull Quartz)

Silicon Dioxide (SiO2)

Quartzite

Quartzite (SiO2)

Chert (varieties: Flint or Chalcedony)

Microcrystalline Quartz (SiO2)

Chert (variations include Flint or Jasper)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Lepidolite

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

Quartzite Pebble

Quartzite (composed primarily of SiO2)

Brown quartz-rich stone, possibly smoky quartz or quartzite

Quartz (SiO₂), potentially in a quartzite or silica-rich matrix

Quartz-rich rock fragment

Microcrystalline quartz (SiO₂), possibly chalcedony or quartz-bearing breccia

Kyanite (Blue Kyanite)

Kyanite (Al2SiO5)

Quartz (Milky Quartz pebble)

Silicon Dioxide (SiO2)

Milky quartz with dark host-rock inclusions

Quartz (SiO₂), likely in a granitic or metamorphic matrix

Milky quartz fragment

Quartz (silicon dioxide, SiO₂)

Quartz-rich vein rock, likely milky quartz in weathered host rock

Milky quartz (SiO₂), probably with weathered feldspar and iron-oxide staining

Tumbled milky quartz

Quartz, silicon dioxide (SiO₂)

Quartzite Cobble

Quartzite (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky quartz

Quartz, silicon dioxide (SiO₂)

Feldspar (Orthoclase / Microcline) with Quartz

KAlSi3O8 (Potassium Feldspar / Orthoclase)

Tumbled pale quartz (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)

Chert (and Flint variant)

Silicon Dioxide (SiO2)

Quartzite

Quartzite (SiO2)

Milky Quartz

Quartz / Silicon Dioxide (SiO2)

Flint (variety of Chert)

Silicon Dioxide (SiO2)

Quartzite

Quartzite (primarily SiO2)

Weathered quartz-rich pebble

Milky quartz, chiefly silicon dioxide (SiO₂), possibly with iron-oxide staining and minor feldspar

Pink Quartzite

Quartzite (SiO2 with iron oxide inclusions)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Iron-Stained or Milky Quartz)

Silicon Dioxide (SiO2)

Chert (Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Clear quartz crystal

Quartz (silicon dioxide, SiO₂)

Light-colored quartz-rich stone, possibly milky quartz

Quartz (SiO₂), provisional identification

White quartz pebble (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Milky quartz (rough quartz specimen)

Quartz, silicon dioxide (SiO₂)

Quartz-rich breccia or vein quartz fragment

Quartz (SiO₂), likely with iron-oxide staining and attached host rock