Organic Gemstone (Fossilized Resin)

Chert (Jasper/Flint Pebble)

Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)

Fossil Shark Tooth (Otodus obliquus)

Otodus obliquus; hydroxyapatite (mineralized form Ca5(PO4)3(OH))

Red Chert (Jasper)

Chert / Microcrystalline Quartz (SiO2)

Chert (Nodule)

Silicon Dioxide (SiO2)

Dendritic Opal (Common Opal)

Amorphous Hydrated Silica (SiO2·nH2O) with Manganese or Iron Oxide inclusions

White Topaz

Al2SiO4(F,OH)2

Beaded Jewelry (Assorted Gemstones)

Various minerals, including but not limited to Quartz (SiO2), Garnet (X3Y2(SiO4)3), Jade (Na(Al,Fe)Si2O6), Amethyst (SiO2),等の多様な組み合わせ

Red Jasper

Silicon dioxide (SiO2) with iron oxide (Fe2O3) inclusions

Chert (Grey/Black variety)

Chert (Silicon Dioxide, SiO2)

Chert (Jasper/Black Chert)

Silicon Dioxide (SiO2)

Chert (often called Flint in this context)

Silicon Dioxide (SiO2)

Mixed Quartz and Jasper Pebbles

Silicon Dioxide (SiO2)

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Cherty Limestone or Flint)

Microcrystalline Silica (SiO2)

Chert (Jasper variation)

Silicon Dioxide (SiO2)

Chert (Flint Nodules)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (often called Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (Iron-stained)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Tan/Brown variety)

Chert (Microcrystalline Quartz, SiO2)

Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Asphalt / Bituminous Aggregate

Bituminous mixture (Hydrocarbon-based sediment)

Chert (Jasper-rich)

Microcrystalline/Cryptocrystalline Quartz (SiO2)

Chert (varietal Chalcedony or Flint)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Quartz Geode

Silicon Dioxide (SiO2)

Chert (Jasper/Limonitic Chert)

Microcrystalline Quartz (SiO2)

Chert (variations include Flint/Jasper)

Cryptocrystalline Silicon Dioxide (SiO2)

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Chert with Quartz/Calcite Vein

Microcrystalline Silica (SiO2)

Petrified Wood

Silicified Wood (primarily SiO2 - Silicon Dioxide)

Chert (specifically Flint or Jasper variant)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline quartz (SiO2)

Quartzite and Chert

Silicon Dioxide (SiO2)

Chert (specifically Flint or Common Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (containing Fossil Inclusions)

Microcrystalline Quartz (SiO2)

Chert Pebble

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Ferruginous Chert

Microcrystalline Quartz (SiO2) with Iron Oxides

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)