Man Made Mineral Simulant (Glass)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Cluster (Likely Ferruginous)

Silicon Dioxide (SiO2)

Pink quartz (likely rose quartz)

Quartz, silicon dioxide (SiO₂), typically massive rose quartz colored by trace elements and microscopic inclusions

Citrine (or Yellow Chalcedony / Quartz)

Silicon Dioxide (SiO2)

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Hematite/Limonite inclusions

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Green Aventurine

Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2 + K(Al,Cr)2AlSi3O10(OH)2

Chalcedony (Common Opal or Agate variant)

Silicon Dioxide (SiO₂)

Yellow Quartz (Citrine/Iron-Stained Quartz)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Smoky Quartz (Vein Quartz)

Quartz (Silicon Dioxide, SiO2)

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Hematite inclusions

Quartz (Milky/Smoky variety)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Sandstone (Quartz-rich)

Arenite

White Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Granite (River Pebble)

Phaneritic intrusive igneous rock (Felsic)

Green Aventurine

Quartz (SiO2) with fuchsite inclusions

Chert

Chert (Microcrystalline Quartz, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

White Quartz

Silicon Dioxide (SiO2)

Milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz with Inclusions

Silicon Dioxide (SiO2)

Amethyst (Tumbled Quarz)

Silicon Dioxide (SiO2) with iron impurities

Quartz with Iron Oxide Inclusions

Silicon Dioxide (SiO2) with Iron Hydroxide/Oxide (Limonite/Goethite)

Agate (specifically, multi-colored or pastel-dyed agate)

Silicon dioxide (SiO2) - specifically, a cryptocrystalline variety of quartz known as Chalcedony, with banding classified as Agate. (If it were Fluorite, the chemical formula would be Calcium Fluoride - CaF2).

Quartz Drusy on Matrix

Silicon Dioxide (SiO2)

Quartz vein in weathered host rock

Milky quartz (SiO₂), likely in a granitic or metamorphic matrix

Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Pink Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Pink Feldspar with Quartz

Potassium Feldspar (Orthoclase) with SiO2

Milky quartz

Quartz, silicon dioxide (SiO₂)

Milky Quartz

Silicon Dioxide (SiO2)

Smoky quartz

Quartz (SiO₂), brown-to-gray smoky variety

Lepidolite Pebble

K(Li,Al)3(Al,Si,3O10)(F,OH)2

Milky Quartz (Druzy Coating)

Silicon Dioxide (SiO2)

Herkimer Diamond

Quartz (Silicon Dioxide - SiO2)

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)