Chert (Flint Pebbles)
Microcrystalline Quartz (SiO2)
Category
Browse sedimentary rock (cryptocrystalline quartz) specimens identified by the Rock Identifier community.
Chert (Flint Pebbles)
Microcrystalline Quartz (SiO2)
Chert (Smooth River Stone)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Quartz (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
Chert (Jasper)
Microcrystalline Quartz (SiO2)
Chert
Microcrystalline quartz (SiO2)
Chalcedony (Agate/Carnelian)
Cryptocrystalline Silicon Dioxide (SiO2)
Geode
Quartz / Chalcedony nodule
Tumbled yellow chert or jasper pebble
Microcrystalline quartz (SiO₂), likely iron-stained chert/jasper
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (specifically Flint or Jasper variant)
Microcrystalline Quartz (SiO2)
Agate
Silicon dioxide (Chalcedony), SiO2
Tumbled jasper or chalcedony
Microcrystalline quartz (SiO₂), likely jasper/chalcedony
Agate
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert (Field Stone)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Iron-stained)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Flint Nodules)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Flint Nodules)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (often called Flint when dark)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert Pebble
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Jasper with Quartz Vein
Microcrystalline quartz (SiO2) and chalcedony with a quartz vein
Chert (Yellow Jasper)
Microcrystalline Quartz (SiO2)
Chert in Limestone (or Flint Nodule)
Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)
Chert (Gray Chalcedony)
Microcrystalline Quartz (SiO2)
Jasper
Silicon Dioxide (SiO2) with impurities, Microcrystalline Quartz
Chert
Microcrystalline Quartz (SiO2)
Banded Chert
Microcrystalline Quartz (SiO2)
Chert (Jasper-like)
SiO2 (Cryptocrystalline Quartz)
Green Jasper / Chert Pebbles
Microcrystalline Quartz (SiO2)
Chert (specifically Gray/Tan Bedded Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Limonite-stained)
Microcrystalline Quartz (SiO2) with iron oxides
Chert Nodule
Microcrystalline Quartz (SiO2)
Jasper
Microcrystalline Quartz (SiO2)
Chert
Microcrystalline Quartz (SiO2)
Chert (Chalcedony/Flint)
Microcrystalline Quartz (SiO2)
Chert
Silicon dioxide (Microcrystalline Quartz, $SiO_2$)
Carnelian (Orange Agate)
Silicon Dioxide (SiO2)
Chert
Silicon Dioxide (SiO2)
Chert (Jasper variation)
Silicon Dioxide (SiO2)
Chert (often called Flint or Jasper)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Jasper Conglomerate
Polymictic Conglomerate (Quartz and Jasper clasts in a quartz-rich matrix)
River Pebble / Chert Pebble
Microcrystalline Quartz (SiO2)