Quartz

Quartz Vein Pebble

Silicon dioxide (SiO2)

Weathered quartz-rich rock, likely quartzite or quartz vein fragment

Quartzite, composed predominantly of SiO₂; possible iron-oxide staining

Green aventurine

Quartzite dominated by quartz (SiO₂), commonly containing fuchsite mica or other inclusions

Quartz with Iron Oxide

SiO2

Yellow Quartz

Silicon Dioxide (SiO2)

Quartz (Float/Abraded)

Quartz (SiO₂)

Strawberry Quartz

Silicon Dioxide (SiO2) with hematite or goethite inclusions

Iron-stained quartz-rich rock, likely quartzite or silicified sandstone

Quartz (SiO₂) with iron-oxide minerals, chiefly hematite/goethite; exact host-rock identification is uncertain from the photograph

Golden Healer Quartz (Iron-Stained Quartz)

Silicon Dioxide (SiO2) with Iron Oxide/Hydroxide inclusions

Quartz (chalcedony variety) or Limestone with Quartz Veins

SiO2 (for Quartz/Chalcedony); CaCO3 (for Limestone)

Quartz (Chalcedony / Rough Quartz Pebble)

Silicon Dioxide (SiO2)

Yellow Quartz

Silicon Dioxide (SiO2)

Rose Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Rose Quartz

Rose Quartz (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Yellow Quartz (or Citrine Quartz)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Sunkissed Quartz or Hematoid Quartz

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz (with Iron Oxide staining)

Silicon Dioxide (SiO2)

Polished white chalcedony or milky quartz pebble

Chalcedony, microcrystalline quartz (SiO₂), possibly with iron-oxide staining or a minor mineral inclusion

Milky quartz (quartz-rich rock fragment)

Quartz, silicon dioxide (SiO₂)

Quartz–mica metamorphic rock, likely schist

Quartz–muscovite/biotite schist; predominantly SiO₂ quartz with phyllosilicate micas

Gold in Quartz Matrix

Native Gold (Au) with Quartz (SiO2)

Granite featuring Quartz Vein

Phaneritic Felsic Igneous Rock (Quartz, Orthoclase Feldspar, Mica)

Ferruginous Sandstone with Quartz Inclusions

Clastic Sedimentary Rock (Iron-rich Sandstone)

Iron-stained quartz crystal

Quartz (SiO₂), likely iron-oxide-coated or included

Iron-stained Quartz Vein

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with iron oxide inclusions/staining (Limonite/Hematite)

Iron-stained Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite inclusions

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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)

Milky and Citrine-type Quartz

Silicon Dioxide (SiO2)

Rose Quartz Bead

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