Quartz

Strawberry Quartz (Hematoid Quartz)

Silicon Dioxide with Hematite/Goethite inclusions (SiO2 + Fe2O3)

Quartz (Milky / Massive Quartz)

Silicon Dioxide (SiO2)

Smoky quartz crystal fragment

Quartz (SiO₂), smoky variety

Quartz with Hematite Inclusions

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)

Milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Bull Quartz (Milky Quartz)

Quartz (Silicon Dioxide - SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Tumbled yellow quartz

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

Milky Quartz

Quartz (Silica - SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (in a rock matrix)

Quartz (SiO2)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Quartzite

Quartzite (primarily SiO2)

Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)

Silicon Dioxide (SiO2) with inclusions/dye

Milky quartz pebble

Quartz (SiO₂), with iron-oxide staining

Quartz Pebble with Host Rock / Schist Matrix

Silicon Dioxide (SiO2) with Metamorphic Host Rock

Rutilated Quartz

SiO2 (Quartz) with TiO2 (Rutile inclusions)

Greenschist (containing Epidote and Quartz)

Greenschist (Epidote-Chlorite-Actinolite Schist)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Weathered quartz-rich rock, possibly milky quartz

Quartz (SiO₂); the specimen may be massive vein quartz, but its identity is uncertain from the photo

Hematoid Quartz

Silicon Dioxide with Iron Oxide Inclusions (SiO2 + Fe2O3)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Tumbled Yellow Quartz (Golden Quartz / Citrine)

Silicon Dioxide (SiO2)

Likely quartz cabochon in a ring

Quartz (SiO₂), possibly clear or milky quartz; identification is uncertain from the photograph

Small white rounded mineral grain, likely quartz

Quartz (SiO₂), probable milky or vein quartz

Quartz with Spessartine Garnet and Biotite

SiO2 (Quartz) with Mn3Al2(SiO4)3 (Spessartine)

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Quartz Vein in Greenstone

Hydrothermal Quartz (SiO2) with Chlorite/Epidote Schist host rock

Multi-Gemstone Quartz Bracelet (Amethyst, Aventurine, Rose Quartz, Clear Quartz)

Silicon Dioxide (SiO2) mixture

Quartz (Druzy / Goldstone Gemstone Cabochon)

Silicon Dioxide (SiO2)

Quartz-rich river pebble (likely milky quartz or quartzite)

Quartz, SiO₂; possibly quartzite, a metamorphic rock dominated by quartz

Quartz / Calcite Pebble

SiO2 (Quartz) or CaCO3 (Calcite)

Quartz crystal with possible chlorite or mica inclusions

Quartz, SiO₂; inclusions may include chlorite (phyllosilicate) or mica

Basalt with Quartz Veins

Basalt

Quartzite with Mica

Metamorphic Quartzite (SiO2 + Mica phyllosilicates)

Epidote and Quartz in Basalt Porpohyry

Epidote bearing Porphyritic Basalt with Quartz Veins