Sedimentary Or Igneous (Host Environment)

Clear Quartz

Silicon Dioxide (SiO2)

Hematite

Iron(III) oxide (Fe2O3)

Clear Quartz Sphere

Quartz (Silicon Dioxide, SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Clear Quartz

Silicon Dioxide (SiO2)

Chalcedony

Silicon Dioxide (SiO₂)

Hematite

Iron(III) oxide (Fe2O3)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Milky and Bull Quartz)

Silicon Dioxide (SiO2)

Red Sandstone

Arenite (with Iron Oxide / Hematite cementation)

Red Sandstone

Arenic rock (composed mainly of SiO2 with Fe2O3)

Pyrite

Iron Pyrite (FeS₂)

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 cement)

Granite Pebble (Salt and Pepper Granite)

Felsic Intrusive Igneous Rock (Granite)

Red Sandstone (Iron-rich)

Ferruginous Sandstone (SiO2 with Iron Oxides)

Chert (Jasper nodule)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Red Sandstone

Arenite (with Iron Oxide)

Red Sandstone

Arenite (primarily Quartz with Hematite cement)

Sandstone (Ferruginous)

Arenite (SiO2 with Fe2O3 inclusions)

Rutilated Quartz

Quartz (SiO2) with Rutile (TiO2) inclusions

Aventurine

Aventurine Quartz (SiO2 with inclusions)

Labradorite

Labradorite (a variety of Plagioclase Feldspar), Na(AlSi3O8) to Ca(Al2Si2O8)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Turquoise

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

Red Sandstone

Arenite with iron oxide (Hematite) cement

Quartz

Silicon Dioxide (SiO2)

Red Sandstone

Arenite (primarily Quartz with Hematite cement)

Pyrite

Pyrite (FeS₂)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Red Jasper (in Quartz/Chalcedony)

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz pebble

Silicon Dioxide (SiO2)

Red Shale

Lutite (primarily composed of clay minerals and iron oxides like hematite, Fe2O3)

Red Sandstone

Ferruginous Sandstone (SiO2 with Fe2O3)

Chert (Iron-stained)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Ferruginous Sandstone (Ironstone Nodules)

Ferruginous Sandstone with Limonite/Goethite coating (Fe2O3·H2O)

Red Sandstone

Arenite