Mixed (Sedimentary, Igneous, And Metamorphic)

Magnetite

Magnetite (Fe3O4)

Magnetite or Hematite (Iron Stone)

Magnetite (Fe3O4) or Hematite (Fe2O3)

Mookaite Jasper

Silicon Dioxide with Iron Oxide impurities (SiO2)

Gneiss

Gneiss

Gneiss

Gneiss (High-grade metamorphic rock)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Greenschist

Chlorite schist

Greenschist

Chlorite schist

Epidote

Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Sand

Silicon Dioxide (SiO2)

Amethyst

Silicon Dioxide (SiO2) containing iron impurities and irradiation

Yellow Quartz (Citrine Quartz)

Silicon Dioxide (SiO2)

Rough Sapphire (Corundum)

Corundum (Al2O3)

Quartz

Quartz (SiO2)

Banded Gneiss

Gneiss (SiO2 enriched metamorphic rock)

Milky Quartz

Quartz / Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Citrine or Iron-Stained)

Silicon Dioxide (SiO2)

Milky Quartz with Algae/Chlorite

Silicon Dioxide (SiO2)

Moonstone

Potassium Aluminum Silicate (KAlSi3O8) with inclusions of Albite

Milky Quartz

Silicon Dioxide (SiO2)

Peach Moonstone

Potassium Aluminum Silicate (KAlSi3O8) with inclusions

Quartz (likely Rose Quartz or Milky Quartz)

Silicon Dioxide (SiO2)

Citrine Quartz

Silicon Dioxide (SiO2)

Yellow Quartz (Citrine or Iron-Stained Quartz)

Silicon Dioxide (SiO2)

Yellow Quartz (Citrine Quartzite)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Black Tourmaline

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz Boulder

Silicon Dioxide (SiO2)

Raw Quartz

Silicon Dioxide (SiO2)

Quartz pebble

Silicon dioxide (SiO2)