Mixed (Sedimentary, Igneous, And Metamorphic)

Green Tourmaline (Verdelite)

Tourmaline Group; often Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4) or Dravite (NaMg3Al6(BO3)3Si6O18(OH)4)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Quartz Pebble

Silicon Dioxide (SiO2)

White Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Milky/Clear Quartz)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Hematite (Iron Ore)

Hematite (Fe2O3)

Pyrite

Iron Sulfide (FeS2)

Quartz (Iron-stained or Milky)

Silicon Dioxide (SiO2)

Quartz / Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Quartz

Silicon Dioxide (SiO₂)

Apatite

Fluorapatite (Ca5(PO4)3F)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz (or Vein Quartz)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO₂)

Quartz (Milky or Common Quartz)

Silicon Dioxide (SiO2)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Hematite

Iron(III) oxide (Fe2O3)

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Quartz (Milky/Smoky variety)

Silicon Dioxide (SiO2)

Pyrite (Iron Pyrite)

Iron Sulfide (FeS2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Milky or Rough Quartz)

Silicon Dioxide (SiO2)

Hematite

Iron(III) oxide (Fe2O3)

Quartz

Silicon Dioxide (SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz Pebble with Iron Inclusions

Silicon Dioxide (SiO2) with iron oxide impurities

River Stone (Granitic Gneiss)

Foliated Granitic Gneiss

Gneiss (Metamorphic Cobble)

Gneiss

Greenstone / Metagraywacke

Metamorphosed basaltic or sedimentary rock (Complex Silicate)

Amethyst

Amethyst (Silicon Dioxide - SiO2)