Igneous And Sedimentary

Clear Quartz

Crystalline Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Quartz (Milky/Rose variety)

Silicon Dioxide (SiO2)

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Fluorite

Fluorite (Calcium Fluoride, CaF2)

Pyrite

Iron Sulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Hematite

Iron(III) oxide (Fe2O3)

Pyrite

Iron Disulfide (FeS2)

Clear Quartz

Silicon Dioxide (SiO2)

Chalcedony (Agate/Blue Quartzite)

Silicon Dioxide (SiO2)

Garnet-Bearing Gneiss

Almandine-Garnet Gneiss

Chalcedony

Cryptocrystalline Quartz (SiO2)

Mineral

Clear Quartz

Silicon Dioxide (SiO2)

River Stone (likely Siltstone or fine-grained Basalt)

Clastic Sedimentary (Siltstone) or Mafic Igneous (Basalt)

sedimentary or igneous

Granite (Dioritic or Hornblende-rich)

Phaneritic Plutonic Felsic to Intermediate Igneous Rock

Black Sand (Magnetite Sand)

Magnetite-rich Placers (Fe3O4)

sedimentary

Leopard Skin Jasper

Rhyolite (Silicon Dioxide with impurities), SiO2

Granite

Granite (composed primarily of Quartz SiO2, Alkali Feldspar KAlSi3O8, and Plagioclase Feldspar)

Green Moss Agate / Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron and Manganese inclusions

sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Wonderstone (Banded Rhyolite)

Rhyolite (Silicon Dioxide with Iron Oxide impurities)

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Iron Oxide inclusions (Fe2O3)

Quartz (Milky or Druzy Quartz)

Silicon Dioxide (SiO2)

Hematite (Iron Ore)

Hematite (Fe2O3)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Granitic Gneiss

Gneiss (Metamorphic Rock)

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Hematite

Iron(III) oxide (Fe2O3)

Clear Quartz

Silicon Dioxide (SiO2)

Gneiss

White Agate (Chalcedony)

Agate (Silicon Dioxide - SiO2)

Gneiss

Fluorite

Calcium Fluoride (CaF2)

Banded Agate (Pink Chalcedony)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

White Quartz Pebbles

Quartz (Silicon Dioxide, SiO2)

Mineral

Quartz (Clear/White)

Silicon Dioxide (SiO2)

Fluorite (Blue)

Calcium Fluoride (CaF2)

Carnelian Agate

Carnelian (SiO2 with iron oxide impurities)