Organic (Non Geological)

Dendritic Agate / Moss Agate

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Amber

Succinite (with formula approximately C10H16O)

Jasper with Agate and Quartz Inclusions

Silicon Dioxide (SiO2) - Chalcedony / Quartz aggregate

Moss Agate

Chalcedony (SiO2) with inclusions of manganese or iron oxides

Chert (Nodule / Geode fragment)

Microcrystalline Quartz (SiO2)

Chert (Polished River Pebble)

Chert (SiO2)

Limestone with Quartz/Calcite Veins

Sedimentary Limestone (CaCO3 with SiO2 or CaCO3 intrusions)

Jasper with Quartz Vein

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (varietal: Jasper or Ironstone nodule)

Microcrystalline Quartz (SiO2) with iron oxides

Chert (Hag Stone / Hole Stone)

Chert (Cryptocrystalline variety of Quartz, SiO2)

Chert (within Asphalt)

Chert (SiO2)

Chert (specifically River Stone / Jasper variety)

Microcrystalline Quartz (SiO2)

Moss Agate

Silicon Dioxide with inclusions (SiO2 + impurities)

Moss Agate

Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxide

Jasper (Petrified Wood variant)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Banded Chert

Cryptocrystalline Quartz (SiO2)

Chert / Quartz Pebble

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Granite

Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).

Petrified Wood

Silicified Wood (SiO2)

Chert (Brown variety)

Silicon Dioxide (SiO2)

Chert Pebble with Quartz Veining

Microcrystalline Quartz (SiO2)

Chert Pebble (Jasper variety)

Microcrystalline Quartz (SiO2)

Coquina

Biogenic Limestone (Calcium Carbonate, CaCO3)

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Chert (varieties include Flint and Jasper)

Silicon Dioxide (SiO2)

Bituminous Coal

Bituminous coal (Organic Sedimentary Rock)

Calcite

Calcite (CaCO 3)

Stromatolite (Jasper-replaced)

Fossilized Stromatolite (Cyanobacteria / Cryptozon / Silica SiO2)

Anthracite Coal

Anthracite

Yellow Chert (Jasper)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (Iron-Stained)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Pink Chert (Brecciated Jasmine/Jasper)

Silicon Dioxide (SiO2)

Chert (Field Stone)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Petrified Wood

Silicified wood (Quartz/Chalcedony replacement of organic matter)

Jasper (Mookaite variety likely)

Silicon Dioxide (SiO2) with iron oxide inclusions

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Chert (specifically Chalcedony/Flint variant)

Silicon Dioxide (SiO2)

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Petrified Wood

Silicified Wood (SiO2 - Silicon Dioxide)

Chert (Quartz Pebble)

Silicon Dioxide (SiO2)

Petrified Wood

Silicified wood (primarily Silicon Dioxide - SiO2)