Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Category
Sedimentary (Cryptocrystalline Silica)
Browse sedimentary (cryptocrystalline silica) specimens identified by the Rock Identifier community.
Chert (and its variety Flint)
Silicon dioxide (SiO2) / Microcrystalline quartz
sedimentary
Chert (Black Chert or Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper/River Pebble)
Silicon Dioxide (SiO2)
sedimentary
Chert (Chert Nodule)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Flint (Chert)
Silicon Dioxide (SiO2)
sedimentary
Chert (Nodule)
Silicon dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Chert (often called Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (often called Flint when dark)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (specifically a stream-worn Chert Nodule)
Sedimentary Cryptocrystalline Quartz (SiO2)
sedimentary
Carnelian and White Quartz Bracelet
Silicon Dioxide (SiO2) - specifically Carnelian (Chalcedony) and Rock Crystal/Snow Quartz
mineral
Chert (Common Opal/Jasper variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert and Chalcedony
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert / Flint Nodules
Cryptocrystalline Quartz (SiO2)
sedimentary
Flint (or Chert)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Flint or Dark Chert)
Chert (SiO2)
sedimentary
Purple Chalcedony (likely dyed Agate)
Silicon Dioxide (SiO2)
mineral
Blue Chalcedony
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Jasper
Cryptocrystalline Quartz (SiO2)
sedimentary
Chalcedony in Limestone Host Rock
Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)
Mineral within Sedimentary Rock
Chert (Flint variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2)
sedimentary
Banded Agate (Pink Chalcedony)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Chert Pebble (Flint)
Microcrystalline/Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (specifically Gray/Tan Bedded Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (often called Flint when dark)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Honey Chert / Flint)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Jasper with Iron Staining
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
sedimentary
Chert (Pink Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (often called Flint)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Chert (Nodular or Massive Variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Banded Agate (River-worn Pebble)
Cryptocrystalline Silicon Dioxide (SiO2)
sedimentary
Chert / Flint Nodule
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Blue Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Banded Chert
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (specifically Jasper or Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (varietal: Flint Pitted Pebble)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper variety)
Cryptocrystalline quartz (SiO2)
sedimentary
Chert (specifically Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary