Igneous, Sedimentary, And Metamorphic

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Gravel / Crushed Stone

Aggregate (mixed mineral rock fragments)

Pyrite

Iron Sulfide (FeS2)

Quartz fragment (Pebble)

Silicon Dioxide (SiO2)

Pyrite

Iron Pyrite (FeS2)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Pyrite

Iron Disulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Clear Quartz / Rock Crystal

Silicon Dioxide (SiO2)

Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Crystalline Silicon Dioxide (SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Blue Apatite

Apatite group (Ca5(PO4)3(F,Cl,OH))

Blue Calcite

Calcite (Calcium Carbonate, CaCO3)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Crystalline variety)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz Mineral

Silicon Dioxide (SiO2)

Hematite

Hematite (Α-Fe2O3)

Blue Calcite

Calcium Carbonate (CaCO3)

Quartz

Silicon Dioxide (SiO2)

Quartz Fragment

Silicon Dioxide (SiO2)

Quartz

Silicon dioxide (SiO2)

Educational Geologic Collection

Mixed Mineral and Rock Collection (Various compositions)

Calcite

Calcium Carbonate (CaCO3)

Pyrite

Iron Sulfide (FeS2)

Dalmatian Stone

Dalmatian Jasper (a misnomer) / Perthitic Igneous Rock

Garnet (specifically Almandine)

Almandine - Fe3Al2(SiO4)3

Banded Gneiss

Metamorphic Gneiss

Pyrite

Iron Pyrite (FeS2)

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Magnetite / Hematite mix (Iron Ore)

Fe3O4 (Magnetite) / Fe2O3 (Hematite)

Magnetite (Lodestone)

Magnetite (Fe3O4)

Quartz (likely a form of massive or vein quartz)

Quartz (SiO₂)

Quartz (Milky or Cloudy Quartz)

Silicon Dioxide (SiO2)

Magnetite Sand (Black Sand)

Magnetite (Fe3O4)

Calcite

Calcium Carbonate (CaCO3)