Chert (specifically Flint or Jasper variant)
Microcrystalline quartz (SiO2)
sedimentary
Category
Organic (Anthropogenic)
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Banded Chert (Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (River Stone)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Field Stone)
Chert (Silicon Dioxide, SiO2)
sedimentary
Petrified Wood / Red Jasper
Silicified wood (primarily Silicon Dioxide, SiO2)
sedimentary
Chert (Flint Pebbles)
Microcrystalline Quartz (SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Chert (specifically Brown Chert or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (White Chert or Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
River Jasper (Chert/Chalcedony)
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Chert (specifically Red Chert or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Glauconitic Sandstone
Glauconitic Quartz Arenite
sedimentary
Chert (varieties include Flint and Jasper)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Chalcedony/Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Shungite
Shungite (carbon-rich Precambrian mineraloid)
mineral
Chert (often referred to as Flint or Jasper)
Chalcedony (SiO2) - Silicon Dioxide
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (White Flint)
Silicon Dioxide (SiO2)
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with fossil inclusions
sedimentary
Chert (containing Iron Oxide)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Green Jasperiod)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert (specifically Gray Chert/Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Chert (SiO2)
sedimentary
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Chert (often called Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Chert (Jasper)
Microcrystalline Silica (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Opaline Silica (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (varietal: Flint/Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (Black Chert/Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (often called Flint or Jasper if reddish)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (with Quartz Druzy)
Microcrystalline Silica (SiO2)
sedimentary
Chert (Jasper/Mudstone)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (often called Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Fossil Shark Tooth
Selachimorpha (Chondrichthyes dental fossil)
sedimentary
Chert (Jasper influence)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary