Igneous, Metamorphic, Sedimentary

Pyrite in Matrix (Fool's Gold)

Iron Sulfide (FeS2)

Magnetite (Octahedral Crystal)

Magnetite (Fe3O4)

Magnetite

Magnetite (Fe3O4)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Magnetite (potentially Hematite)

Magnetite (Fe₃O₄)

Zoisite with Rubellite (Ruby in Zoisite)

Zoisite with inclusions of Hornblende (Anyolite)

Zoisite with Ruby

Anyolite (Calcium aluminum hydroxy silicate with Corundum) Ca2Al3(SiO4)3(OH)

Quartz

Silicon dioxide (SiO2)

Clear Quartz (Faceted)

SiO2 - Silicon Dioxide

Faceted Clear Quartz or Diamond Simulant

Silicon Dioxide (SiO2) if Quartz or Cubic Zirconia (ZrO2) if Synthetic

Pyrite

Iron Sulfide (FeS2)

Quartz

Silicon Dioxide (SiO2)

Quartz (Pebble)

Silicon Dioxide (SiO2)

Quartz Crystal Rock

Silicon Dioxide (SiO2)

Yellow Calcite

Calcium Carbonate, CaCO3

Milky Quartz

Silicon Dioxide (SiO2)

Blue Calcite

Calcium Carbonate (CaCO3)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Quartz (Raw Chunk)

Silicon Dioxide (SiO2)

Pyrite (Fools Gold)

Iron Disulfide (FeS2)

Feldspar

KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8 (Feldspar group)

Quartz

Silicon Dioxide (SiO2)

Pyrite

Iron Pyrite (FeS2)

Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2)

Quartz Crystal

Silicon Dioxide (SiO2)

Galena

Lead Sulfide (PbS)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Agate/Jasper pebble)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Snow)

Silicon Dioxide (SiO2)

Blue Apatite

Fluoroapatite (Ca5(PO4)3F)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Magnetite Orthorthotropic Rock

Magnetite (Fe3O4)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)