Quartz

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Greywacke with Quartz Vein

Matrix: Impure Sandstone (SiO2 + varied clasts), Veins: Quartz (SiO2)

Quartz with Mica/Host Rock

Silicon Dioxide (SiO2) with Phyllosilicates

Jasper with Quartz Veining

Silicon Dioxide (SiO2) with iron oxide impurities

Quartz, Sandstone, and Siltstone specimens

Silicon Dioxide (SiO2) and Clastic Sedimentary Rocks

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Rose Quartz

Silicon Dioxide (SiO2)

Iron-stained Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Clear Quartz crystals on a Matrix base (Geode fragment)

Silicon Dioxide (SiO2)

Quartzite with Quartz Veining

Quartzite (primarily SiO2)

Quartzite

Quartzite (SiO2)

Rutilated Quartz

Quartz (SiO2) with Rutile (TiO2) inclusions

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Druzy (Geode Fragment)

Silicon Dioxide (SiO2)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Milky Quartz Vein with Matrix

Silicon Dioxide (SiO2)

Blue Quartz (Blue Aventurine)

Silicon Dioxide (SiO2) with inclusions (typically crocidolite or dumortierite)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Smoky Quartz and Feldspar Pegmatite

Granitic Pegmatite (chiefly SiO2 and KAlSi3O8)

Orange Quartz

Silicon Dioxide (SiO2)

Quartz (likely Rose Quartz or Milky Quartz based on color)

Quartz (SiO2 - Silicon Dioxide)

Quartz

Quartz (SiO₂)

Rose Quartz

SiO2 (Silicon Dioxide)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Orange Quartz with Epidote

Silicon Dioxide (SiO2) with Calcium Aluminum Iron Silicate hydroxide (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

Tourmalinated Quartz

Silicon dioxide (SiO2) with inclusions of Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)

Quartzite

Quartzite (predominantly SiO2)

Quartzite

Quartzite (mostly SiO2)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (predominantly SiO2)

Quartzite

Quartzite (composed primarily of SiO2)