Anthropogenic (Man Made Material)

Yellow Quartzite (Iron-Stained Quartzite)

Quartzite (SiO2 with Fe2O3 trace impurities)

Jasper (specifically Fancy or Polychrome Jasper)

Silicon Dioxide (SiO2) - Chalcedony

Quartz (Gravel fragment)

Quartz (Silicon Dioxide, SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

Chert (Cherty Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Flint variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Agate (specifically a small Chalcedony nodule)

Agate (Cryptocrystalline variety of Quartz, SiO2)

Chert (variations include Flint)

Chert (SiO2)

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Banded Chert

Microcrystalline Quartz (SiO2)

Dyed Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Chert (specifically Flint or Jasper variant)

Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)

Chert (Jasper/Flint Pebble)

Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)

Diamond

Native Carbon (C)

Banded Calcite (often sold as 'Mexican Onyx' or 'Green Onyx')

Calcite (Calcium Carbonate, CaCO3)

Chert (Brown Variety)

Silicon dioxide (SiO2)

Chert (specifically a nodule with Chalcendony/Agate banding)

Microcrystalline Quartz (SiO2)

Chert (and Chalcedony)

Silicon Dioxide (SiO2)

Chert (Yellow Jasper/Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper)

Cryptocrystalline Quartz (SiO2)

Banded Chert (Jasper)

Silicon Dioxide (SiO2)

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Chert (Flint variety)

Silicon Dioxide (SiO2)

Chert (Jasper/Agate variety)

Microcrystalline quartz (SiO2)

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions), SiO2

Chert (and Flint)

Silicon Dioxide (SiO2)

Chert (variously known as Flint or Jasper)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Agate

Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony

Muscovite Mica (Granitic Pegmatite)

Muscovite - KAl2(AlSi3O10)(OH)2

Jasper Agate (specifically Brecciated Jasper with Agate inclusions)

Silicon Dioxide (SiO2)

Vesicular Basalt (Scoria)

Basalt (Extrusive Igneous Rock)

Shale

Fissile Clay-dominant Mudrock (SiO2, Al2O3, K2O, Na2O, CaO, MgO)

Moss Agate

Silicon Dioxide (SiO2) with inclusions

Rough Diamond

Diamond (pure carbon, C)

Chert Pebble / Brachiopod Fossil Internal Mold

Silicon Dioxide (SiO2) / Fossil: Brachiopoda (generic internal mold)

Chert (varietal: Flint or River Pebble)

Silicon Dioxide (SiO₂)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)