Mineral (Specifically A Variety Of Chalcedony, Which Is Microcrystalline Quartz)

Jasper (specifically Red Jasper)

Silicon Dioxide with Iron Oxides (SiO2 + Fe2O3)

Sandstone (Micaceous Sandstone)

Arenite (SiO2 with KAl2(AlSi3O10)(OH)2 inclusions)

Chert (River Pebble)

Chert (SiO2)

Agate

Silicon Dioxide (SiO2) - variety: Chalcedony

Milky Quartz with Mineral Inclusions

Quartz (Silicon Dioxide, SiO2)

Citrine (Yellow Quartz)

Silicon Dioxide (SiO2)

Green Aventurine

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

Black Tourmaline (Schorl)

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Dyed Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Green Aventurine

Silicon Dioxide (Quartz) with inclusions (SiO₂)

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Chert (varietal Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz with Pyrite inclusions

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions

Petrified Wood

Silicified Wood (SiO2)

Chert (Flint variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert / Flint (River Pebble)

Cryptocrystalline Quartz (SiO2)

Rose Quartz

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

Chert (Chert / Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Flint variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Quartz (River Pebble)

Quartz (SiO₂ - Silicon Dioxide)

Dyed Agate (Tumbled)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Agate

Silicon Dioxide (SiO2) - variety of Chalcedony

Carnelian Agate

Silicon Dioxide (SiO2) - variety of Chalcedony

Carnelian Agate

Silicon dioxide (SiO2) - Chalcedony variety

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Zircon

Zircon (ZrSiO4)

Chert

Chert (Microcrystalline Quartz, SiO2)

Chert (Jasper)

Silicon Dioxide (SiO2)

Chert (variously known as Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Pink Granite

Phaneritic Felsic Igneous Rock (Granite)

Gold-bearing Quartz

Auriferous Quartz (SiO2 with Native Gold inclusion)

Chert (Flint variety)

Chert (SiO2)

Banded Agate (Orca Agate)

Silicon Dioxide (SiO2) - Chalcedony variety

Chert (Common Chert)

Cryptocrystalline Quartz (SiO2)

Green Moss Agate

Agate (Silicon Dioxide - SiO2) with inclusions of hornblende or chlorite

Tumbled Stone Collection (featuring Tiger's Eye, Rose Quartz, and Moss Agate)

Mixed Silicates and Oxides (predominantly SiO2 group minerals)

Mixed Quartz and Jasper Pebbles

Silicon Dioxide (SiO2)

Quartzite

Quartzite (SiO2)

Chert (Jasper type)

Microcrystalline Quartz (SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)