Mineraloid (Cryptocrystalline Quartz)

Chert Pebble (with Quartz Vein)

Chert (Cryptocrystalline Silica - SiO2)

Chert (Flint)

Silicon Dioxide (SiO2)

Jasper with Dendritic Inclusions

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (often called Flint or Jasper when red)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (and Limestone)

Chert (consisting of Microcrystalline Quartz, SiO2)

Chert (Nodule)

Chert (primarily Microcrystalline Quartz - SiO2)

Chert (specifically Flint Arrowhead)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Carnelian (Chalcedony)

Cryptocrystalline Quartz (SiO2) with Iron Oxide impurities

Bloodstone

Heliotrope (cryptocrystalline Quartz, SiO2 with inclusions of Hematite)

Sardonyx Agate Sphere

Cryptocrystalline Quartz (SiO2) with iron oxide inclusions

Carnelian

Cryptocrystalline Quartz (SiO2 with iron oxide impurities)

Heliotrope (Bloodstone)

Cryptocrystalline Quartz (SiO2) with inclusions of Hematite (Fe2O3)

Sardonyx Cameo

Silicon Dioxide (SiO2) - variety Cryptocrystalline Quartz

Red Chert (Jasper)

Cryptocrystalline Quartz (SiO2) with iron oxide inclusions

Yellow Jasper

Silicon Dioxide (SiO2) - Impure Cryptocrystalline Quartz

Carnelian (a variety of Chalcedony)

Cryptocrystalline Quartz (SiO2) with iron oxide inclusions

Quartz Pebble

Silicon Dioxide (SiO2)

Bloodstone (Heliotrope)

Cryptocrystalline Quartz (SiO2) with inclusions of Hematite or Chlorite

Flower Agate

Chalcedony (cryptocrystalline Quartz) with Spherulite inclusions; SiO2

Bloodstone

Heliotrope (a variety of Cryptocrystalline Quartz / Jasper, SiO2)

Banded Agate (Tumbled)

Agate (Silicon Dioxide, SiO2 - Cryptocrystalline Quartz)

Chrysoprase

Chalcedony (cryptocrystalline quartz) with nickel inclusions; SiO2

Banded Agate (specifically Sardonyx or Black Agate variety)

Silicon Dioxide (SiO2) - Chalcedony / Cryptocrystalline Quartz

Agate (or Chalcedony)

SiO2 (Silicon Dioxide) - a cryptocrystalline variety of quartz

Chert (and its variety Flint)

Silicon Dioxide (SiO2) - Microcrystalline or cryptocrystalline Quartz

Chert (and Flint)

Silicon dioxide (SiO2) - Microcrystalline or Cryptocrystalline Quartz

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2 (Silicon Dioxide)

Crazy Lace Agate

Agate (Cryptocrystalline Quartz), Silicon Dioxide (SiO2)

Chert

Siliceous sedimentary rock (predominantly microcrystalline quartz, SiO2)

Ocean Jasper (Orbicular Jasper)

Spherulitic Chalcedony/Rhyolite (SiO2)

Chert (and Jasper blend)

Chert (Microcrystalline Quartz, SiO2)

Banded Agate / Lace Agate

Agate (Silica/Quartz) - SiO2

Red Chert (Jasper)

Chert / Microcrystalline Quartz (SiO2)

Carnelian

Carnelian (SiO2 - Silicon Dioxide with Iron Oxide impurities)

Yellow Chalcedony (Agate)

Silicon Dioxide (SiO2)

Chert with Quartz Veining

Silicon Dioxide (SiO2)

Chert (Tan/Grey)

Chert (Silicon Dioxide, SiO2)

Chert (with Quartz vein)

Chert (Silicon Dioxide, SiO2)

Carnelian

Carnelian (a variety of Chalcedony, which is a microcrystalline quartz, SiO₂)

Petrified Wood

Silicified Wood (SiO2)

Ocean Jasper

Silicon Dioxide (SiO2)

Petrified Wood

Silicified Wood (primarily SiO2)