Mineral, Variety Of Quartz

Labradorite

Labradorite (a calcium-enriched feldspar mineral), (Ca, Na)(Al, Si)4O8

Quartz / Clear Quartz

Silicon Dioxide (SiO2)

Fulgurite

Fulgurite (Lechatelierite-rich variety)

Quartz / Milky Quartz

Silicon Dioxide (SiO2)

Quartz / Vein Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Ferruginous Sandstone

Arenite with Iron-Oxide Cement (SiO2 with Fe2O3/FeO(OH))

Chert (Red/Pink Jasper subtype)

Silicon Dioxide (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Jasper

Silicon dioxide (SiO2)

Gold Ore in Quartz

Auriferous Quartz (SiO2 with Au inclusions)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide) - SiO2

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Iron-Stained)

Silicon Dioxide (SiO2)

Green Quartz (including Prase or Aventurine variants)

Silicon Dioxide (SiO2) with inclusions (likely Actinolite or Chlorite)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Fluorite

Fluorite (Calcium Fluoride - CaF2)

Quartz / Milky Quartz

Silicon Dioxide (SiO2)

Common Opal with Host Rock

Opal (Hydrated silica, SiO2·nH2O)

Agate (Water-Worn Pebble)

Silicon Dioxide (SiO2) - Chalcedony

Granite (Pink Orthoclase variety)

Phaneritic intrusive igneous rock (Quartz, Orthoclase, Plagioclase, and Mica)

Quartzite

Quartzite (primarily SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Chrysoprase

Chalcedony (cryptocrystalline silica containing nickel); Chemical Formula: SiO2 with Ni impurities

Dendritic Agate

Silicon Dioxide (SiO2) with inclusions

Chert (Cherty Flint/Jasper variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Red Sandstone (Siltstone/Mudstone variety)

Ferruginous Sandstone (composed primarily of Quartz with Hematite cementation)

Chrysocolla

Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O)

Granite or Granodiorite (Weathered)

Granite

Jasper (Iron-stained Chert)

Silicon Dioxide (SiO2) with impurities of Hematite or Goethite

Quartz / Quartz Geode fragment

Silicon Dioxide (SiO2)

Man-made Green Quartz (Lab-grown or Treated)

Silicon Dioxide (SiO2) with artificial coloration

Jasper (Iron-rich Microcrystalline Quartz)

Silicon Dioxide (SiO2) with Hematite inclusions

Quartz (Riverstone / Cobble)

Silicon Dioxide (SiO2)

Chert (Flint)

SiO2 (predominantly microcrystalline or cryptocrystalline quartz)

Pink Stained Rock (Likely Quartzite or Sandstone with Iron Oxide Staining)

Quartzite (metamorphic) or Sandstone (sedimentary); coloration likely due to hematite or other iron oxides.

Chert

Chert (SiO2)