Chert
Silicon dioxide (SiO2)
Category
Browse sedimentary rock (cryptocrystalline quartz) specimens identified by the Rock Identifier community.
Chert
Silicon dioxide (SiO2)
Petrified Wood
Silicified Wood (primarily SiO2)
Agate
Silicon dioxide (SiO2) - Microcrystalline Quartz
Banded Chert (Agate-like Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2)
Petrified Wood
Silicified wood (Quartz/Chalcedony - SiO2)
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
Chert (Quartz Variety)
Chert (mostly SiO2 / Silicon Dioxide)
Chert (Yellow Jasper/Flint)
Silicon dioxide (SiO2) - Cryptocrystalline Quartz
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
Chert (and Flint variant)
Chert (SiO2)
Chert (also known as Flint or Common Chalcedony)
Cryptocrystalline Silica (SiO2)
Chert (with Quartz veins)
Microcrystalline Quartz (SiO2)
Chert Pebble with Quartz Veining
Microcrystalline Quartz (SiO2)
Yellow Chalcedony
Silicon Dioxide (SiO2)
Chert (Yellow or Ochre Jasper variant)
Microcrystalline Quartz (SiO2)
Chert
Microcrystalline Quartz (SiO2)
Chert Nodules in Limestone
Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Chert / Flint
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Agate Geode Slice (with Druzy Quartz)
Silicon Dioxide (SiO2)
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
Chert (White/Light Tan)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (River Pebble)
Microcrystalline silicon dioxide (SiO2)
Chert (Chert Nodule with Chalky Cortex)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert (often called Flint)
Chert (Microcrystalline Quartz, SiO2)
Chert (Chert Nodule with Cortex)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert / Jasper
Microcrystalline Quartz (SiO2)
Chert / Flint Nodules in Limestone
Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)
Chert (Holey Stone)
Microcrystalline Quartz (SiO2)
Banded Chert (or Flint)
Microcrystalline Quartz (SiO2)
Yellow Agate
Chalcedony (cryptocrystalline Quartz), SiO2
White Jade / White Chalcedony
Nephrite Jade (Ca2(Mg,Fe)5Si8O22(OH)2) or Chalcedony (SiO2)
Chalcedony (Agate/Quartz)
Silicon Dioxide (SiO2)
Chert / Jasper
Microcrystalline Quartz (SiO2)
Chert (Nodule/Pebble)
Chert (Silicon Dioxide, SiO2)
Chert (varietal: Jasper or Flint)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Chert (with Liesegang Banding)
Microcrystalline quartz (SiO2)
Chert (Pebble)
Chert (Microcrystalline Quartz, SiO2)
Chert (Brown variety)
Silicon Dioxide (SiO2)
Banded Chert (River Pebble)
Microcrystalline Quartz (SiO2)
Chert (specifically a weathered Chert nodule or fragment)
Chert; Microcrystalline or Cryptocrystalline Quartz (SiO2)