Mineral On Sedimentary

Sandstone

Arenite

Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Gneiss

Metamorphic rock of high-grade regional metamorphism

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Quartz Geode

Silicon Dioxide (SiO2) within a geode

Pyrite (Fool's Gold) in Matrix

Iron Sulfide (FeS2)

Quartz

Silicon Dioxide (SiO2)

Limonite

Limonite (Hydrated iron(III) oxide-hydroxide) FeO(OH)·nH2O

Hematite

Iron(III) oxide (Fe2O3)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz Geode

Silicon Dioxide (SiO2)

Chalcedony (Agate/Quartz pebble)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Blue Calcite

Calcium Carbonate (CaCO3)

Pyrite (on Quartz matrix)

Iron Disulfide (FeS2)

Gold Nugget

Native Gold (Au)

Calcite

Calcium Carbonate (CaCO3)

Quartz Geode

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Geode

Silicon Dioxide (SiO2)

Quartz Geode

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Quartz Geode

Silicon Dioxide (SiO2)

Fluorite (Green Fluorite)

Calcium Fluoride (CaF2)

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial pigment

Agate (Carnelian / Chalcedony)

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Quartz

Silicon dioxide (SiO2)

Garnet Schist

Almandine Garnet in Schist (X3Al2(SiO4)3)

Sandstone (Quartz Arenite)

Clastic Sedimentary Rock - Quartz Arenite

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Almandine Garnet

Almandine, Fe3Al2(SiO4)3

Kyanite

Kyanite (Al2SiO5)

Chalcedony on Matrix

Silicon Dioxide (SiO2)

Caribbean Calcite

Aragonite and Calcite (CaCO3)

Carnelian

Carnelian (Silicon Dioxide, SiO2)

Carnelian

Carnelian (Silicon Dioxide, SiO2)

Hematite

Hematite (Α-Fe2O3)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (Milky/Crystalline variety)

Silicon Dioxide (SiO2)