Metamorphic, Likely Sedimentary With Quartz Veins

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂), opaque-to-translucent milky variety

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Epidosite with Quartz (Unakite-variant or Jasper)

Epidotized Metasomatite

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2)

White Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

River Cobble (likely Metasedimentary or Basalt)

Metamorphosed Siltstone or Altered Fine-grained Igneous Rock

Quartz pebble

Silicon dioxide (SiO2)

River Quartzite Siltstone

Quartz-rich Meta-siltstone (SiO2 dominated)

White quartz pebble (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Painted River Rock

Artificially Coated Sedimentary Rock

Quartz (likely Yellow/Orange variety, possibly Citrine or Chalcedony with iron staining)

Quartz (SiO₂)

Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz Vein in Host Rock (likely Sandstone or Mudstone)

Silicon Dioxide (SiO2) within Sedimentary Matrix

Yellow Quartz (Citrine Quartz / Milky Quartz)

Silicon Dioxide (SiO2)

Quartz (Smoky Quartz variant)

Silicon Dioxide (SiO2)

Light-colored quartz-rich stone, possibly milky quartz

Quartz (SiO₂), provisional identification

Quartz with inclusions (likely Chlorite or Hornblende) and country rock

SiO2 (Quartz) with associated ferromagnesian minerals

Sandstone with Quartz Vein

Arenite with Quartz (SiO2) protrusion

Beryl (likely Emerald or Aquamarine in matrix)

Beryllium aluminum silicate (Be3Al2Si6O18)

Weathered quartz-rich metamorphic rock

Likely quartzite or quartz-rich gneiss; exact identification requires a fresh surface and testing

Likely quartz-rich metamorphic rock (quartzite or milky quartz)

Quartzite; predominantly quartz (SiO₂), possibly with feldspar and iron-oxide staining

Sandstone (Arkose)

Arkose Sandstone (SiO2 with KAlSi3O8)

Quartz Veined Quartzite or Sandstone

Quartzite with Quartz Veins (SiO2)

Tumbled white quartz pebble

Quartz (silicon dioxide, SiO₂), likely milky quartz

Quartz-rich pegmatite (likely feldspar–quartz rock)

Granitic pegmatite; predominantly quartz (SiO₂) and feldspar, with possible mica and iron-oxide staining

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Quartz (likely Milky Quartz or Chalcedony)

Quartz (SiO2 - Silicon Dioxide)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Tumbled quartz crystal (likely smoky or iron-stained quartz)

Quartz, silicon dioxide (SiO₂)

Milky quartz (likely quartzite or massive quartz)

Quartz, silicon dioxide (SiO₂)

Chert (with Quartz Veining)

Microcrystalline Quartz (SiO2)

Quartz Vein in Schist

Quartz (SiO2) in Pelitic Schist

Gold in Quartz Matrix

Native Gold (Au) with Quartz (SiO2) and Slate/Shale

Quartz Heart or Arrowhead Shape

Silicon Dioxide (SiO2)

Quartz (vein quartz)

SiO2 (Silicon Dioxide)

Amethyst (Tumbled)

Amethyst (SiO2 with iron impurities)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)