Chert (often called Flint when dark)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Category
Sedimentary (Cryptocrystalline Silica)
Browse sedimentary (cryptocrystalline silica) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Cryptocrystalline Silica) in the encyclopedia
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Chert (Jasper/Agate variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Botryoidal Chalcedony
Cryptocrystalline Silicon Dioxide (SiO2)
mineral
Carnelian
Carnelian (Silica, SiO2)
mineral
Yellow Agate Bottle
Cryptocrystalline Silicon Dioxide (SiO2)
sedimentary
Chalcedony in Limestone Host Rock
Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)
Mineral within Sedimentary Rock
Chalcedony (Carnelian/Jasper Pebble)
Cryptocrystalline Quartz (SiO2)
mineral
Carnelian / Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Chalcedony
Cryptocrystalline Quartz (SiO2)
Mineral
Yellow Jasper
Jasper (Silicon Dioxide with Iron Hydroxide impurities, SiO2 + FeO(OH))
sedimentary
Chert
Chert (Microcrystalline Silica, SiO2)
sedimentary
Chert (or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (and Cherty Limestone)
Silicon Dioxide (SiO2) with impurities
sedimentary
Chert (Nodule)
Microcrystalline Silica (SiO2)
sedimentary
Chert (Flint)
Chert (Cryptocrystalline Silicon Dioxide, SiO2)
sedimentary
Red Jasper
Microcrystalline Quartz (Chalcedony), SiO2
sedimentary
Chert (Jasper/Limonitic Chert)
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Silicon Dioxide (Microcrystalline Quartz), SiO2
sedimentary
Chert (Jasper/Flint variety)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (varietal Flint)
Microcrystalline quartz (SiO2)
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (concretionary/nodular variant)
Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions
sedimentary
Banded Flint (Chert)
Silicon Dioxide (SiO2)
sedimentary
Black Onyx
Chalcedony (Silicon Dioxide - SiO2)
mineral
Chert (Jasper/Carnelian variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Smooth River Siltstone/Basalt variant)
Silicon dioxide (SiO2) / Microcrystalline Quartz
sedimentary
Agate Geode
Cryptocrystalline Quartz (SiO2)
mineral
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Agate Geode
Silicon Dioxide (SiO2)
sedimentary
Chalcedony (Quartz)
Silicon dioxide (SiO2)
mineral
Banded Agate
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chalcedony
Silicon Dioxide (SiO2)
mineral
Chert (often called Flint)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Chert (varieties: Flint or Jasper)
Silicon dioxide (SiO2) / Microcrystalline Quartz
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Flint or Jasper variant)
Microcrystalline quartz (SiO2)
sedimentary
Yellow Chert (Cherty Pebble)
Silicon Dioxide (SiO2)
sedimentary
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Dyed Blue Agate Slice
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Nodule)
Chert (Silicon dioxide, SiO2)
sedimentary