Mineral, Specifically A Variety Of Quartz

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2) with Limonite/Goethite

Jasper (likely Kambaba or Crocodile Jasper variety)

Silicon Dioxide (SiO2) with inclusions

Sunstone with Black Tourmaline (Arfvedsonite)

Feldspar (Na,Ca)(Al,Si)4O8 with Schorl Na(Fe3+)3Al6(Si6O18)(BO3)3(OH)3(OH)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Green Aventurine

Aventurine Quartz (SiO2 with inclusions of Fuchsite mica)

Moss Agate

Silicon Dioxide (SiO2) with inclusions

Amazonite

Amazonite (KAlSi3O8, a variety of Microcline)

Chert (specifically Jasper/Carnelian variety)

Microcrystalline quartz (SiO2)

Smoky Quartz (with inclusions)

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

Aventurine (likely Green Aventurine)

Quartz (SiO2) with included minerals (Fuchsite or Chlorite for green color)

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Yellow Jasper

Jasper, a microcrystalline variety of Quartz (SiO2) with iron inclusions

Milky Quartz Pebble (Tumbled Quartzite)

Silicon Dioxide (SiO2)

Milky Quartz Geode or Druzy Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Chert (often called Flint or Chalcedony Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz (Clear / Rock Crystal)

Silicon Dioxide (SiO2)

Tourmalinated Quartz

Silicon Dioxide (SiO2) with Schorl inclusions (NaFe2+3Al6(BO3)3Si6O18(OH)4)

Chert (Flint Nodules)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Smoky Quartz (with complementary stones in jewelry setting)

Smoky Quartz (Silicon Dioxide - SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron inclusions

Carnelian

Cryptocrystalline Quartz (SiO2)

Druzy Agate (specifically Black Druzy Agate)

Silicon Dioxide (SiO2)

Citrine

Silicon Dioxide (SiO2) with iron impurities

Citrine Quartz

Citrine (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (likely Herkimer Diamond style)

Silicon Dioxide (SiO2)

Buffalo Nickel (Indian Head Nickel)

Cupronickel (75% Copper, 25% Nickel)

Jasper (likely Polychrome or Desert Jasper)

Silicon Dioxide (SiO2) with impurities

Dalmatian Stone

Dalmatian Jasper (Aplitic Rock)

Milky Quartz

Silicon Dioxide (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Carnelian (a variety of Chalcedony)

Silicon Dioxide (SiO2) with iron oxide impurities

Carnelian

Carnelian (a variety of Chalcedony) - SiO2

Banded Agate

Cryptocrystalline Quartz (SiO2)

Agate (or Banded Agate)

Agate (a variety of Chalcedony, which is a cryptocrystalline form of Quartz); Chemical Formula: SiO₂ (Silicon Dioxide)

Blue Chalcedony

Silicon Dioxide (SiO2)

Lace Agate (specifically Red Lace Agate)

Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz

Red Jasper

Jasper (Silicon Dioxide, SiO2 with Iron Oxide impurities)

Quartz Veined Rock (Likely Graywacke or Quartzite)

Silicon Dioxide (SiO2) veins in Metasedimentary matrix