Sedimentary (Jasper), Mineral (Aquamarine)

Chert (and its variety Flint)

Silicon dioxide (SiO2) / Microcrystalline quartz

Chert / Flint

Cryptocrystalline Quartz (SiO2)

Chert (often called Flint when dark)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Chert (often called Flint when dark)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (often called Flint)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Red Jasper (Skull Carving)

Jasper (Silicon Dioxide, SiO2 plus Iron Oxide inclusions)

Jasper (Yellow/Brown variety)

Silicon Dioxide (SiO2) with iron oxide impurities

Red Jasper with Quartz and Hematite

Silicon Dioxide (SiO2) with Ferric Iron inclusions

Red Jasper (possibly Wonderstone)

Silicon Dioxide (SiO2) with iron oxide inclusions

Red Jasper (Brecciated or Mottled)

Silicon Dioxide (SiO2) with iron oxide inclusions

Chert (Jasper variety)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Chert (Quartz Variety)

Chert (SiO2)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Jasper (Iron-stained Chert)

Silicon Dioxide (SiO2) with impurities of Iron Oxide

Red Jasper (possibly Chert/Argillite)

Jasper (SiO2) with iron oxide inclusions

Mixed Tumbled Gemstones and River Rocks

Mixed Decorative Stones (predominantly Silicon Dioxide - SiO2 variants)

Chert (Jasper/Jasperoid)

Chert (chemically precipitated microcrystalline Quartz, SiO2)

Chert (variations include Flint/Jasper)

Cryptocrystalline Quartz (SiO2)

Chert (Flint variety)

Silicon Dioxide (SiO2)

Chert (and Flint)

Silicon Dioxide (SiO2)

Red Chert

Microcrystalline Quartz (SiO2)

Chert Pebble (Jasper variety)

Microcrystalline Quartz (SiO2)

Chert (often referred to as Flint or Jasper when pigmented)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (and Flint)

Silicon Dioxide (SiO2)

Chert (Jasper variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (Yellow Jasper)

Microcrystalline Quartz (SiO2)

Red Jasper (River Siltstone)

Silicon Dioxide (SiO2) with iron oxide inclusions

Jasper (Iron-stained Chert)

Silicon Dioxide (SiO2) with iron oxide inclusions

Chert (Yellow or Brown Jasper)

Microcrystalline Quartz (SiO2)

Chert (often called Flint in dark varieties)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (specifically Flint or Jasper variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Jasper (Mookaite style)

Silicon Dioxide (SiO2) with iron and manganese inclusions

Red Jasper (Plum or Brick variety)

Silicon Dioxide (SiO2) with iron oxide inclusions (Hematite)

Dragon Stone (Dragon Blood Jasper)

Epidote with Pietersite or Red Jasper inclusions (varied SiO2 and Ca2(Al,Fe)3(SiO4)3(OH))

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (specifically Flint or Common Opal variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper variety)

Chert (Silicon Dioxide, SiO2)

Chert (often called Flint or Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Conglomerate

Conglomerate (Sedimentary rock containing rounded clasts)

Chert (Jasper variety)

Silicon Dioxide (SiO2)