Igneous, Metamorphic, And Sedimentary

Pyrite (on the right) and Magnetite or Hematite (on the left)

Iron Sulfide (FeS2) and Iron Oxide (Fe3O4 or Fe2O3)

Quartz (Gravel Pebble)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Gneiss (River Cobble)

Metamorphic Gneiss

Gneiss

Gneiss (Metamorphic Rock)

Gneiss

Foliated Metamorphic Rock

Pink Garnet (likely Almandine or Rhodolite)

Garnet Group (Fe3Al2(SiO4)3 to Mg3Al2(SiO4)3)

Gneissic Schist

Gneiss-schist (Metamorphic rock)

Gneiss

Gneiss (High-grade metamorphic rock)

Mixed Quartz Bracelet (Rose Quartz and Larimar-colored beads)

Silicon Dioxide (SiO2) with various inclusions

Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Pyrite

Iron Disulfide (FeS2)

Pyrite (Fool's Gold) in Matrix

Iron Disulfide (FeS2)

Tumbled Clear Quartz/Rock Crystal

Silicon Dioxide (SiO2)

Pyrite

Iron Disulfide (FeS2)

Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Blue Apatite

Calcium Phosphate (Ca5(PO4)3(F,Cl,OH))

Bornite

Bornite (Cu5FeS4)

Unidentifiable Rock Fragment

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Pyrite (locally known as Fool's Gold)

Iron Sulfide (FeS2)

Pyrite

Iron Disulfide (FeS2)

Blue Apatite

Apatite-(CaF), Ca5(PO4)3F

Pyrite in Matrix (Fool's Gold)

Iron Disulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Gold Mineral

Native Gold (Au)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Yellow Quartz (Citrine/Yellow Jasper mix)

Silicon Dioxide (SiO2)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Garnet

Almandine (Fe3Al2(SiO4)3)

Milky Quartz

Silicon Dioxide (SiO2)

Magnetite

Magnetite (Fe3O4)

Banded Gneiss

Gneiss (Metamorphic Rock)

Quartz Sand Gravel

Silicon Dioxide (SiO2)

Gneiss

Gneiss (High-grade metamorphic rock)

Greenschist

Chlorite schist

Greenschist

Chlorite schist

Quartz Sand

Silicon Dioxide (SiO2)

Magnetite / Iron Ore

Magnetite (Fe3O4)

Calcite

Calcium Carbonate (CaCO3)