Sedimentary Rock (Possibly Conglomerate Or Breccia With A Quartz Vein)

Quartzite with Quartz Veining

Quartzite (primarily SiO2)

Turquoise

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

Quartz

Quartz (SiO₂)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Amethyst

Amethyst (Silicon Dioxide, SiO2)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions

Clear Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Pyrite in Shale

Iron Disulfide (FeS2)

Pyrite (on Quartz/Host Rock)

Iron Sulfide (FeS₂)

River Pebbles (Tumbled Quartz and Basalt)

Silicon Dioxide (SiO2) for white quartz; Mafic Volcanic Rock for basalt

Quartz

Quartz (SiO2, Silicon Dioxide)

Quartz (likely Milky Quartz or Chalcedony)

Quartz (SiO2 - Silicon Dioxide)

Amethyst

SiO2 (Silicon Dioxide) - a variety of Quartz

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Granodiorite with Quartz Veining

Granodiorite (containing Plagioclase Feldspar, Quartz, and Biotite/Hornblende) with Quartz (SiO2) veins

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Turquoise

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

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Fluorite (likely Green Fluorite variant)

Calcium Fluoride (CaF2)

Sandstone

Arenite (SiO2 based)

Smoky Quartz

SiO2 (Silicon Dioxide)

Milky Quartz

Silicon Dioxide (SiO2)

Geode (Unopened)

Silica-rich concretion (SiO2)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Basalt with Quartz/Calcite Veins

Amygdaloidal Basalt (SiO2 or CaCO3 inclusions)

Quartz / Limestone Gravel

SiO2 (Silicon Dioxide) and CaCO3 (Calcium Carbonate)

Milky Quartz with Mineral Inclusions

Silicon Dioxide (SiO2) with miscellaneous inclusions

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Quartz with Iron Stains

Quartz (SiO2) with iron oxide/hydroxide staining

River Cobble (Phyllite or Quartzite)

Metasedimentary Rock (often containing SiO2 or KAl2(AlSi3O10)(OH)2)

Rose Quartz

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

Quartz (Milky/Clear Variety)

Silicon Dioxide (SiO2)

Chert (Jasper/Flint Pebble)

Microcrystalline quartz (SiO2)

Quartz (likely milky/gray variety)

Quartz (SiO₂)

Agate

Silicon dioxide (SiO2)

Gold Nugget Jewelry

Native Gold (Au)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz with Iron Staining

Silicon Dioxide (SiO2)