Quartz

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Pyrite in Quartz

Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)

Graphite-bearing quartz-mica schist

Graphite-rich quartz–mica schist; primarily quartz (SiO₂), muscovite/biotite, and graphite (C)

Quartz Vein in Schist

Quartz (SiO2) in Pelitic Schist

Banded Rock (likely Quartz-rich)

Uncertain, likely a Metamorphic Rock (e.g., Gneiss or Schist) with prominent Quartz and other minerals

Polished agate pebble

Banded chalcedony, a microcrystalline variety of quartz (SiO₂)

Tumbled chalcedony or quartz fragment

Microcrystalline quartz, SiO₂ (probable chalcedony)

Quartz-rich stone, possibly aventurine quartz or quartzite

Quartz (SiO₂), likely massive or microcrystalline; exact identification requires testing

Serpentine Schist with Quartz Vein

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

Likely milky quartz

Quartz (SiO₂)

Quartzite

Quartzite

Green Aventurine

Quartz (SiO2) with fuchsite inclusions

Yellow Quartz (Citrine / Golden Quartz)

Silicon Dioxide (SiO2)

Likely polished/tumbled quartz-rich specimen

Quartz, silicon dioxide (SiO₂), possibly an agate or chalcedony variety

Quartz-rich rock, likely milky quartz

Quartz (SiO₂), possibly massive vein quartz

Milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Gold-bearing quartz (probable sulfide-bearing quartz)

Quartz, SiO₂, with possible pyrite or mica inclusions

Tumbled blue gemstone, likely blue quartz or dyed chalcedony

Quartz (SiO₂), possibly chalcedony; exact identification requires testing

Polished brown stone, likely smoky quartz or jasper

Tentatively quartz (SiO₂), possibly smoky quartz; exact identification requires testing

Rose Quartz

Quartz (Silicon Dioxide, SiO2) with trace inclusions of dumortierite

Mixed small mineral specimens

Likely quartz varieties with possible rose quartz and iron-stained quartz; exact identification is uncertain from the blurred image

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Tumbled quartz-rich stone, possibly druzy quartz or chalcedony

Quartz/chalcedony (SiO₂); exact identification is uncertain from the photograph

Tumbled green aventurine

Quartz (SiO₂) containing green fuchsite mica inclusions; a variety of quartzite

Quartzite with Quartz Veining

Metamorphosed Quartz-rich Sandstone (SiO2)

Milky quartz pebble

Quartz (SiO₂), commonly called milky quartz

Milky quartz pendant

Quartz (silicon dioxide, SiO₂)

Quartz-rich translucent stone, possibly quartzite or milky quartz

Quartz (SiO₂), potentially quartzite if the specimen is metamorphic

Quartzite (or Milky Quartz)

Silicon Dioxide (SiO2)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Quartz geode

Microcrystalline quartz and drusy quartz (SiO₂), likely with iron-oxide staining

Tumbled amber-brown quartz (probable smoky quartz or carnelian)

Quartz, SiO₂; color may reflect iron impurities or irradiation

Tumbled cream-colored stone, likely quartz or chalcedony

Microcrystalline quartz (chalcedony), SiO₂; exact identification is uncertain from the image

Tumbled milky quartz

Quartz (SiO₂), cryptocrystalline to coarse-grained quartz aggregate

Weathered quartz-rich rock, likely quartzite or altered sandstone

Quartzite (mostly microcrystalline quartz, SiO₂); exact identification is uncertain from the photograph

Faceted colorless quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

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 pebble

Quartz (SiO₂)

Quartz (Milky Quartz / Clear Quartz)

Silicon Dioxide (SiO2)