Organic (Zoogenic)

Chert (specifically a variety like Flint or River Jasper with Iron Oxidation)

Microcrystalline Quartz (SiO2)

Yellow Quartzite (River Pebble)

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Chert (Flint/Jasper variety)

Microcrystalline Quartz (SiO2)

Fossilized Crinoid Stem

Class Crinoidea (Echinodermata)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Nodular Chert)

Microcrystalline Silica (SiO2)

Banded Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Mookaite Jasper

Silicified radiolarite (SiO2)

Quartzite

Quartzite (SiO2)

Gold-bearing Quartz

Auriferous Quartz (SiO2 with Native Gold inclusion)

Chert (Yellow Jasper)

Silicon Dioxide (SiO2)

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Garnet Schist

Almandine-Garnet Mica Schist

Diorite

Phaneritic Intrusive Igneous Rock (composed of Plagioclase feldspar, Hornblende, and Biotite)

Fossilized Honeycomb Coral

Favosites (extinct genus of tabulate corals)

Mookaite Jasper

Silicified Radiolarite (SiO2 with impurities)

Chert / Flint

Cryptocrystalline quartz (SiO2)

Chert (specifically Flint or Jasper variant)

Chert (Siliceous rock composed of microcrystalline Quartz, SiO2)

Chert (variant of Flint)

Chert (SiO2)

Mookaite Jasper

Radiolarite (Silicified radiolarian chert), SiO2

Chert (Jasper/Common Chert)

Microcrystalline Quartz (SiO2)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Milky Quartz (Gold-bearing Prospecting Specimen)

Silicon Dioxide (SiO2)

Chert (and/or Flint)

Silicon Dioxide (SiO2)

Chert (White/Gray variety)

Chert (SiO2)

Chert (Golden/Yellow Variety)

Microcrystalline Silica (SiO2)

Quartz-veined Mudstone or Argillite

SiO2 (Quartz) in Siltstone/Mudstone matrix

Script Jasper

Cryptocrystalline Quartz (SiO2) with fossiliferous inclusions

Chert (specifically Blue Chert/Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Mookaite (Mookaite Jasper)

Silicified Radiolarite (SiO2 with iron oxides)

Amber Flint (Chert)

Cryptocrystalline Quartz (Silicon Dioxide, SiO2)

Chert (varietal Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Sandstone (likely with Borings or Vesicular Basalt)

Clastic Sedimentary Rock (Sandstone)

Petrified Wood

Silicified Wood (SiO2)

Fossiliferous Chert (with Brachiopod or Mollusk fragments)

Silicon dioxide (SiO2) with Calcium Carbonate (CaCO3) inclusions

Basalt with Desert Varnish

Mafic Igneous Rock with Ferromanganese Coating

Chert (specifically Flint or Dark Chalcedony)

Silicon Dioxide (SiO2)

Chert (Jasper variety)

Microcrystalline quartz (SiO2)

Chert (Nodule)

Chert (mainly Microcrystalline or Cryptocrystalline Quartz, SiO2)

Diorite (River Cobble)

Phaneritic Intermediate Plutonic Rock

Mookaite Jasper

Silicified Radiolarite (Silicon Dioxide: SiO2)