Sedimentary And Igneous (Mixed)

Honey Calcite

Calcium Carbonate (CaCO3)

Garnet (Almandine)

Almandine (Fe3Al2(SiO4)3)

Pyrite (Cube variety)

Iron Sulfide (FeS2)

Gneiss

Gneiss (High-grade Metamorphic Rock)

Quartz

Silicon Dioxide (SiO2)

Calcite

Calcium Carbonate (CaCO3)

Botryoidal Chalcedony (Agate)

Silicon Dioxide (SiO2)

Gneiss

Metamorphic Gneiss (High-grade regional metamorphism)

Banded Gneiss

Foliated Gneiss

Hematite

Iron(III) oxide (Fe2O3)

Pyrite

Iron Disulfide (FeS2)

Pyrite

Iron Disulfide (FeS2)

Quartz (Clear Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Common Milky Quartz)

Silicon Dioxide (SiO2)

Quartz (Milky or Cloudy variety)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Potassium Feldspar

Orthoclase (KAlSi3O8)

Galena

Lead Sulfide (PbS)

Clear Quartz

Silicon Dioxide (SiO2)

Hematite (Iron Ore)

Hematite (Fe2O3)

Pyrite

Iron disulfide (FeS2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Hematite

Iron(III) oxide (Fe2O3)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Pyrite

Iron Disulfide (FeS2)

Pyrite

Iron Disulfide (FeS2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky/Crystal variety)

Silicon Dioxide (SiO2)

Quartz Druzy (on Calcedony/Quartz base)

Silicon Dioxide (SiO2)

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Gneiss

Gneiss (High-grade metamorphic rock)

Quartz (Small Fragment)

Silicon Dioxide (SiO2)

Banded Gneiss (with Quartz Vein)

Gneiss (Metamorphic rock of varying mineralogy)

Gneiss

Gneiss

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)

Gneiss

Gneiss

Jasper

Silicon dioxide (SiO2)

Agate Geode with Quartz Druzy

Cryptocrystalline Quartz (SiO2)