Sedimentary Rock (Technically Chert, A Microcrystalline Quartz)

Chalcedony Nodule (Agate/Chert)

Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)

Chert Nodule (with Flint core)

Sedimentary Cryptocrystalline Quartz (SiO2)

Glauconitic Sandstone

Glauconitic Sandstone (contains (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)

Clear Quartz (or Rock Crystal)

Quartz (SiO₂)

Dalmatian Stone

Dalmatian Jasper (actually a Peralkaline Igneous Rock)

Sandstone Chert Concretion

Silica-cemented Concretion (primarily SiO2)

Chert (Jasper/Chalcedony)

Microcrystalline Silica (SiO2)

Orange Quartzite (Tumbled)

Quartzite (SiO2)

Quartz / Common Opal Transition

Silicon Dioxide (SiO2)

Jasper

Jasper (Silicon Dioxide, SiO2)

Chert (Jasper/Flint variant)

Silicon Dioxide (SiO2)

Brachiopod Fossil in Chert

Phylum Brachiopoda within Microcrystalline Quartz (SiO2)

Bumble Bee Jasper

Calcite-bearing Volcanic Tuff (not a true Jasper)

Chert (containing Flint and Calcareous inclusions)

Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) impurities

Chert (specifically Flint or Common Opal variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Crazy Lace Agate

Silicon Dioxide (SiO2) with iron and aluminum inclusions

Sandstone with Secondary Mineral Encrustation

Arenite with Silica/Calcite deposits (SiO2 or CaCO3)

Green Jasper

Silicon Dioxide (SiO2) with iron silicate inclusions

Quartz Veined Siltstone or Graywacke

Clastic Sedimentary Rock with Quartz (SiO2) veining

Snowflake Obsidian

Spherulitic Volcanic Glass (primarily SiO2 with Cristobalite inclusions)

Green Aventurine

Aventurine (variety of Quartz - SiO2)

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Fancy Jasper

Chalcedony (cryptocrystalline quartz) with inclusions

Yellow Chert (Gold-colored River Pebble)

Microcrystalline Quartz (SiO2) with Limonite/Goethite staining

Geode (Unopened)

Silicon Dioxide (SiO2) in sedimentary vugs

Tiger's Iron

Pseudomorphic Quartz Aggregate (contains SiO2 with Fe2O3 and FeOOH)

Dalmatian Stone

Peralkaline rhyolite

Jasper Shard / Chert

Silicon dioxide (SiO2)

Jasper (Yellow/Brown variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Agate (Nodule/Chert)

Silicon Dioxide (SiO2)

Jasper (specifically Bloodstone/Heliotrope or Dark Green Jasper)

Cryptocrystalline Quartz (SiO2) with inclusions

Chalcedony

Cryptocrystalline Quartz (SiO2)

Quartzite / Sandstone / Chert Mix

Silicon Dioxide (SiO2)

Chert (Arrowhead Fragment)

Chert / Microcrystalline Silicon Dioxide (SiO2)

Ocean Jasper

Orbicular Jasper (Silicon Dioxide, SiO2)

Dalmatian Stone (commonly called Dalmatian Jasper)

Peralkaline Rock (mixed Feldspar, Quartz, and Arfvedsonite)

Jasper (Zebra Jasper)

Silicon Dioxide (SiO2) with impurities

Chert (Flint)

Chert (SiO2)

Jasper (specifically Red or Brecciated Jasper variant)

Jasper (Microcrystalline Quartz - SiO2)

Red Chert (Jasper)

Cryptocrystalline Quartz (SiO2) with iron oxide inclusions

Bumblebee Jasper

Calcite with Arsenic and Manganese oxides (technically a volcanic rock)

Mookaite Jasper

Silicified radiolarite (SiO2)