Mineral (Variety Of Quartz)

Smoky quartz (small rough fragment)

Quartz, SiO₂; smoky variety

Smoky quartz chips

Quartz, SiO₂ (smoky variety)

Amethyst

Quartz, purple variety — SiO₂

Amethyst

Quartz, SiO₂, purple variety

Yellow Aventurine

Quartz variety (SiO2) with inclusions

Banded Agate

Cryptocrystalline variety of Quartz (SiO2)

Amethyst

Amethyst (variety of Quartz, SiO2)

Green Aventurine

Aventurine (a variety of Quartz, SiO2)

Tumbled amethyst and likely smoky quartz inclusion specimen

Amethyst: purple quartz, SiO₂; left stone appears quartz-rich with brown iron-oxide inclusions, possibly “garden quartz” or included smoky quartz

Quartz (Clear or Milky)

Silicon Dioxide (SiO2)

Brown agate (chalcedony)

Microcrystalline quartz, SiO₂; likely iron-stained chalcedony

Tumbled rose quartz

Quartz, silicon dioxide (SiO₂), pink variety

Polished agate slice

Agate, a banded variety of chalcedony (microcrystalline SiO₂)

Tumbled agate/chalcedony pebble

Microcrystalline quartz (SiO₂), likely brown/banded agate or jasper

Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Titanium Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Red jasper (likely)

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored by iron oxides

Polished green aventurine point

Quartz (SiO₂), green variety colored mainly by fuchsite inclusions

Polished banded jasper (likely picture jasper)

Microcrystalline quartz, chiefly SiO₂; jasper with iron-oxide staining

Rose quartz

Quartz, silicon dioxide (SiO₂), pink variety

Milky Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Tumbled jasper (likely brecciated or red jasper)

Jasper, microcrystalline quartz (SiO₂) with iron-oxide inclusions

Milky Quartz Pebbles

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Amethyst-bearing quartz (rough/tumbled fragment)

Quartz, SiO₂; purple coloration from irradiation and trace iron

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)