Quartz

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartzite

Quartzite (primarily SiO2)

Rose Quartz

Silicon dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Tumbled pink quartz (likely rose quartz)

Quartz, silicon dioxide (SiO₂), likely rose quartz variety

Rutilated Quartz (beads)

SiO2 with TiO2 inclusions (Titanium Dioxide inclusions within Quartz)

Quartz with Schist Matrix

Crystalline Silicon Dioxide (SiO2) in micaceous schist

Quartz with Mica Schist Matrix

Quartz (SiO2) in Mica Schist Matrix

Quartz (Smoky/Milky)

Silicon Dioxide (SiO2)

Red Quartz (Tumbled)

Silicon Dioxide with Iron Oxide inclusions (SiO2)

Milky Quartz with Iron Inclusions

Crystalline Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartzite

Quartzite (chiefly SiO2)

Rutile in Quartz (Rutilated Quartz)

SiO2 with TiO2 inclusions

Pink quartz beads (likely rose quartz)

Quartz, SiO₂; pink color commonly from trace inclusions or lattice defects

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Pyrite in Quartz

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)

Quartz-veined Metamorphic Rock

Quartz Vein in Phyllite or Schist (SiO2 in Silicate Matrix)

Quartz Vein in Host Rock (Likely Slate or Shale)

Hydrothermal Quartz (SiO2) in Pelitic host rock

Quartz Geode with Iron Staining

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions

Strawberry Quartz (Hematoid Quartz)

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

Quartz (Milky / Massive Quartz)

Silicon Dioxide (SiO2)

Rounded quartz-veined pebble

Likely quartz-veined metamorphic rock; exact host rock is indeterminate from the image

Quartz

Quartz (SiO₂)

Quartz Vein in Metamorphic Rock

Quartz-veined Schist or Gneiss

Coarse-grained Quartz with Feldspar inclusions

Crystalline Quartz (SiO2) with Orthoclase/Plagioclase Feldspar inclusions

Quartzite or Quartz Vein Material

SiO2

Quartz-rich breccia or iron-stained quartzite

Silica-rich rock dominated by quartz (SiO₂), with minor iron oxides and possible feldspar

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Likely milky quartz fragment

Quartz (silicon dioxide, SiO₂), possibly with iron-oxide or mica inclusions

Milky Quartz / Quartz Geode Fragment

Silicon Dioxide (SiO2)

Quartz (Milky/Smoky Quartz)

Silicon Dioxide (SiO2)

Quartz (Smoky/Milky Variety)

Silicon Dioxide (SiO2)

Tumbled yellow quartz

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

Bull Quartz (Milky Quartz)

Quartz (Silicon Dioxide - SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silica - SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Quartz Vein in Greenstone

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

Quartz-lined vesicle in basalt (amygdaloidal basalt)

Amygdaloidal basalt with drusy quartz; predominantly plagioclase, pyroxene, and iron oxides