Organic Gemstone (Succinite)

Chert (Chert Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Pearl

Calcium Carbonate (CaCO3) in the form of orthorhombic Aragonite and Conchiolin

Chert (Chalcedony/Agate)

Microcrystalline Quartz (SiO2)

Chert (Black Flint)

Silicon Dioxide (SiO2)

Pearl

Pearl (Calcium Carbonate with organic conchiolin, CaCO3)

Natural or Cultured Pearl

Calcium Carbonate (Aragonite and Conchiolin), CaCO3

Jasper (Red-Brown)

Silicon Dioxide (SiO2) with Iron Oxide impurities

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Chalky/Gray Variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Pink variety)

Microcrystalline Quartz (SiO2)

Chert (and Chert-based Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (and Quartzite)

Microcrystalline silica (SiO2)

Chert (specifically Red Chert/Jasper variety)

Silicon Dioxide (SiO2)

Green Jasper

Silicon Dioxide (SiO2) with impurities

Chert / Flint

Microcrystalline or cryptocrystalline quartz (SiO2)

Chert (Chalcedony)

Silicon Dioxide (SiO2)

Chert (varietal Flint or Jasper)

Microcrystalline Quartz (SiO2)

Chert (Brown Variety)

Silicon dioxide (SiO2)

Chert (Flint Nodules)

Chert (Microcrystalline Quartz, SiO2)

Chert (Jasper variety)

Chert (SiO2)

Chert (White-Tan variety)

Silicon dioxide (SiO2) / Microcrystalline Quartz

Chert (Flint)

Microcrystalline or cryptocrystalline quartz (SiO2)

Chert (Iron-rich variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Yellow Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (specifically Tan/Yellow Chert)

Chert (Microcrystalline or Cryptocrystalline Silica, SiO2)

Chert (Nodular)

Chert (SiO2 - Microcrystalline Quartz)

Chert (Commonly known as Flint or Jasper when pigmented)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (variations include Flint/Jasper)

Cryptocrystalline Quartz (SiO2)

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (Flint variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (often called Flint when dark)

Chert (Microcrystalline or Cryptocrystalline Silica, SiO2)

Red Jasper

Jasper (Silicon Dioxide, SiO2 with iron oxide impurities)

Chert (often called Flint or Jasper)

Chert (Microcrystalline or Cryptocrystalline Silica, SiO2)

Chert (Commonly known as Flint)

Microcrystalline Quartz (SiO2)

Chert / Flint

Cryptocrystalline Quartz (SiO2)

Chert / Flint

Cryptocrystalline Quartz (Silicon Dioxide, SiO2)

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Translucent amber-colored gemstone, likely citrine or amber

Most plausibly quartz (SiO₂), specifically citrine; amber would be fossilized resin (organic polymer)

Chert (varieties include Flint and Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)