Quartz

Tumbled pink quartz (likely rose quartz)

Rose quartz, quartz (SiO₂)

Polished rose quartz

Rose quartz (quartz), SiO₂

Tourmalinated quartz

Quartz (SiO₂) with black tourmaline (schorl; NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄) inclusions

Quartz and Slate Pebbles

Silicon Dioxide (SiO2) and Metamorphosed Shale/Mudstone

Rounded quartz-veined pebble

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

Quartz Geode with Iron Staining

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions

Quartz-rich rock, likely milky quartz with dark mica/amphibole

Quartz (SiO₂) in a granitic or metamorphic matrix; dark portion may be biotite or amphibole

Likely polished milky quartz pebble

Quartz, silicon dioxide (SiO₂)

Strawberry Quartz and Rose Quartz

Silicon Dioxide (SiO2) with inclusions

Quartzite

Quartzite (primarily SiO2)

Clear quartz bangle

Quartz (silicon dioxide, SiO₂)

Iron-stained Quartz

Silicon Dioxide with Hematite/Limonite impurities (SiO2 + Fe2O3)

Milky quartz with iron-stained mica

Quartz (SiO₂), likely intergrown with muscovite and minor iron oxides

White chalcedony or quartz-rich pebble

Microcrystalline quartz (SiO₂), possibly with minor calcite or feldspar

Rounded quartz-rich pebble

Likely quartzite or quartz-rich sandstone pebble; SiO₂-dominant

Small gray rock fragment, likely granite or diorite

Uncertain; probable coarse-grained silicate rock dominated by feldspar and quartz, possibly biotite/hornblende

Quartz (Smoky/Milky Variety)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Smoky Quartz)

Silicon Dioxide (SiO2)

Milky quartz-rich vein rock (likely quartzite or silicified host rock)

Quartz, SiO₂; possibly quartzite with iron-oxide and minor feldspar/clay inclusions

Milky quartz

Quartz (silicon dioxide, SiO₂)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Yellow Quartz

Silicon Dioxide (SiO2)

Milky Quartz with Iron Oxide Weathering

Silicon Dioxide (SiO2) with Goethite/Limonite coatings

Quartz (Tumbled)

Silicon Dioxide (SiO2)

Yellow Quartz (Citrine Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz Beads

SiO2 (Silicon Dioxide)