Quartz

Milky Quartz

Silicon Dioxide (SiO2)

Serpentine Schist with Quartz Vein

Serpentine Schist (a type of Metamorphic rock). The white band is likely Quartz (SiO2).

Quartz with Mica (Pegmatite)

Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide (KAl2(AlSi3O10)(OH,F)2)

Milky Quartz Beads

SiO2 (Silicon Dioxide)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz / Rose Quartz fragment

Silicon Dioxide (SiO2)

Milk Quartz (Vein Quartz)

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Geode fragment, likely quartz-lined basalt or chalcedony nodule

Microcrystalline quartz (SiO₂), possibly with iron-oxide staining in a basaltic host

White Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

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

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Quartz-rich breccia or druzy quartz specimen

Microcrystalline to crystalline SiO₂, likely quartz/chalcedony with iron-oxide staining and possible host-rock fragments

Pink quartz (likely rose quartz)

Quartz, silicon dioxide (SiO₂); probable rose quartz

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky Quartz / Clear Quartz)

Silicon Dioxide (SiO2)

Strawberry Quartz

Silicon Dioxide (SiO2) with Hematite or Goethite inclusions

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Goethite/Limonite inclusions

Quartz with Pyrite and Lichen

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)

Quartz Druzy / Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Quartz (Rose Quartz or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Tourmalinated Quartz

Quartz (SiO2) with included Tourmaline (complex borosilicate)

Quartzite

Metamorphic Quartzite (SiO2)

Quartzite

Quartzite (SiO2)

Pegmatitic Granite

Granite (composed of Quartz, Feldspar, and Mica)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Milky quartz-bearing rock, possibly quartzite

Quartz (SiO₂), likely in a quartzite or quartz-rich metamorphic matrix

Green Quartz / Prasiolite

Silicon Dioxide (SiO2)

Iron-stained Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite inclusions

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within metamorphic/igneous matrix

Amethyst geode

Quartz, SiO₂; purple variety colored mainly by iron impurities and irradiation

Quartz-rich granitic rock (likely pegmatitic granite)

Granite/pegmatite; predominantly quartz (SiO₂), feldspar, and dark biotite or amphibole