Chert
Microcrystalline Quartz (SiO2)
Category
Browse sedimentary rock (cryptocrystalline quartz) specimens identified by the Rock Identifier community.
Chert
Microcrystalline Quartz (SiO2)
Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Tumbled jasper or chert (tentative)
Microcrystalline quartz, SiO₂, likely opaque chalcedony/jasper
Chert (River Siltstone/Quartzite type)
Microcrystalline Quartz (SiO2)
Chert (with Quartz Veining)
Microcrystalline Quartz (SiO2)
Banded Chert
Silicon Dioxide (SiO2)
Chert (Chert Nodule with Cortex)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Red Jasper with Quartz Vein
Microcrystalline Quartz (SiO2) with Hematite inclusions
Polished jasper or chert
Microcrystalline quartz (SiO₂), likely iron-stained jasper/chalcedony
Chert (Jasper variation)
Silicon Dioxide (SiO2)
Chert (varietal: Jasper or Flint)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Chert Pebble
Microcrystalline Quartz (SiO2)
Agate (Polished Slice)
Silicon Dioxide (SiO2)
Chert (Green variety)
Microcrystalline Quartz (SiO2)
Chalcedony (Agate/Quartz)
Silicon Dioxide (SiO2)
Chert Nodules in Limestone
Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
Chert / Flint Nodular Fragment
Microcrystalline quartz (SiO2)
Chert / Flint
Microcrystalline Quartz (SiO2)
Chert (specifically Flint or Gray Chalcedony)
Microcrystalline Quartz (SiO2)
Agate
Silicon Dioxide (SiO2)
Chert (Nodule)
Microcrystalline Quartz (SiO2)
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
Chert (Jasper/Chalcedony)
Microcrystalline Quartz (SiO2)
Chert / Yellow Jasper
Microcrystalline Quartz (SiO2)
Banded Agate (Tumbled)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert (Flint / Agate Nodule)
Silicon Dioxide (SiO2)
Chert
Microcrystalline Quartz (SiO2)
Carnelian
Silicon Dioxide (Chalcedony variety), SiO2
Carnelian
Silicon Dioxide, variety of chalcedony (SiO2)
Chert Concretion / Nodule
Microcrystalline Quartz (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Chert (Flint)
Chert (SiO2)
Banded Chert / Mookaite Jasper
Microcrystalline Quartz (SiO2)
Polished red jasper
Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides
Blue Lace Agate
Cryptocrystalline Quartz (SiO2) with trace minerals
Jasper and Basalt (Lake Superior Agate or Jasper Pebble)
Silicified rock / Cryptocrystalline quartz (SiO2) with basalt matrix
Quartz Pebble
Silicon Dioxide (SiO2)
Chert (Jasper/Agate variety)
Microcrystalline quartz (SiO2)
Chert Concretion
Chert (Microcrystalline Quartz, SiO2)
Chert (Nodule)
Silicon Dioxide (SiO2)
Geode (Unopened)
Siliceous Septarian Concretion / Geode (SiO2)