Sedimentary (Secondary Mineral) Within Igneous

Blue Celestite (with Galena)

Strontium sulfate (SrSO4) and Lead sulfide (PbS)

Calcite

Calcium Carbonate (CaCO3)

Hematite (Iron Ore)

Hematite (Fe2O3)

Yellow Chalcedony (Agate Pebble)

Silicon Dioxide (SiO2)

Quartz Geode

Silicon Dioxide (SiO2) within a secondary sedimentary structure

Turquoise

Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Geode with Iron-Stained Quartz/Calcite

Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3) in Sedimentary Matrix

Chert Pebble with Quartz Veins

Microcrystalline Quartz (SiO2)

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Turquoise

Turquoise - CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)

Basalt (Vesicular)

Vesicular Basalt

Ferruginous Sandstone (Gozzan)

Iron-rich clastic sedimentary rock with Limonite/Goethite

Orange Calcite

Calcium Carbonate (CaCO3)

Quartz Geode

Crystalline Quartz (Silicon Dioxide, SiO2)

Green Calcite

Calcium Carbonate (CaCO3)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Chert (specifically Agate/Jasper variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Sandstone (Quartzose)

Arenite (composed primarily of SiO2)

Quartz Geode

Silicon Dioxide (SiO2)

Jasper with Hematite inclusions

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Turquoise

CuAl6(PO4)4(OH)8·4H2O (Hydrated copper and aluminum phosphate)

Pyrite

Iron Pyrite (FeS2)

Yellow Jasper

Silicon Dioxide (SiO2) with hydrated iron oxide impurities (Goethite)

Amazonite

Amazonite (KAlSi3O8) - a variety of Microcline Feldspar

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Quartz Geode

Silicon Dioxide (SiO2) in a Secondary Formation

Blue Calcite (commonly sold as Caribbean Calcite)

Calcium Carbonate (CaCO3)

Blue Calcite

Calcium Carbonate (CaCO3)

Bloodstone (Heliotrope)

Silicon Dioxide (SiO2) with inclusions of Chlorite or Actinolite

Jasper with Quartz inclusions

Silicon Dioxide (SiO2) - Microcrystalline Chalcedony

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Pyrite and Sunstone

Iron Sulfide (FeS2) and Plagioclase Feldspar ((Ca,Na)Al(Al,Si)Si2O8)

Green Aventurine (Green Quartzite)

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Banded Sandstone (Liesegang Rings)

Sedimentary Arenite (SiO2 with FeO/Fe2O3 impurities)

Dalmatian Stone (often misnamed Dalmatian Jasper)

Aplite (with hornblende/arfvedsonite inclusions)

Quartz (Drusy/Crystalline)

Silicon Dioxide (SiO2)

Green Calcite

Calcium Carbonate (CaCO3)

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Blue Calcite

Calcium Carbonate (CaCO3)