Chert (with Limestone and Iron Oxide staining)
Cryptocrystalline Quartz (SiO2)
sedimentary
Category
Sedimentary (Secondary Classification: Cryptocrystalline Quartz)
Browse sedimentary (secondary classification: cryptocrystalline quartz) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Secondary Classification: Cryptocrystalline Quartz) in the encyclopedia
View all →
Chert / Flint
Cryptocrystalline quartz (SiO2)
sedimentary
Chert (often called Flint or Agate nodule)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert Arrowhead
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Cryptocrystalline quartz (SiO2)
sedimentary
Chert / Flint (River Pebble)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert Pebble with Quartz Veining
Microcrystalline Quartz (SiO2)
sedimentary
Quartz (Chalcedony/Agate)
Silicon Dioxide (SiO2)
mineral
Quartz Geode (Cracked)
Crystalline Silicon Dioxide (SiO2)
mineral
Botryoidal Chalcedony
Chalcedony (SiO2)
Mineral
Agate Geode
Cryptocrystalline Quartz (SiO2)
mineral
Jasper and Mudstone Composite
Silicified Sedimentary Rock / Jasperoid Pebble
sedimentary
Sandstone with Quartz Vein
Arenite with hydrothermal quartz intrusion
sedimentary
Dendritic Jasper
SiO2 (Microcrystalline Quartz)
mineral
Dyed Agate
Chalcedony (SiO2)
Mineral
Clear Quartz
Silicon dioxide (SiO2)
mineral
Chalcedony (Tumbled)
Cryptocrystalline Quartz (SiO2)
mineral
Banded Agate (Tumbled)
Cryptocrystalline Quartz (SiO2)
mineral
Yellow Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Banded Agate
Cryptocrystalline Quartz (SiO2)
mineral
Agate (Chalcedony)
Cryptocrystalline Quartz (SiO2)
mineral
Quartz Geode with Chalcedony
Silicon Dioxide (SiO2) in Geode Form
sedimentary
Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Chert (often called Flint when found in chalk/limestone)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Jasper with Quartz inclusions
Silicon Dioxide (SiO2) - Microcrystalline Chalcedony
sedimentary
Red Jasper with Quartz veins
Jasper (Silicon Dioxide, SiO2) with macrocrystalline Quartz veins
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) in a Secondary Formation
sedimentary
Quartz Geode (Cracked Open Fragment)
Silicon Dioxide (SiO2)
mineral
Jasper with Quartz inclusions
Silicon Dioxide (SiO2) - Microcrystalline Chalcedony
sedimentary
Weathered, biotite-bearing granite or granitic gneiss
Quartz–feldspar–biotite rock; likely granite (compositionally, quartz + K-feldspar/plagioclase + biotite), possibly weakly foliated gneiss
igneous
Carnelian Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Carnelian and White Quartz Bracelet
Silicon Dioxide (SiO2) - specifically Carnelian (Chalcedony) and Rock Crystal/Snow Quartz
mineral
Banded Chalcedony (Agate)
Cryptocrystalline Quartz (SiO2)
mineral
Agate Geode
Cryptocrystalline Quartz (SiO2)
mineral
Botryoidal Chalcedony (Geode fragment)
Silicon Dioxide (SiO2)
mineral
Chalcedony (Carnelian/Jasper Pebble)
Cryptocrystalline Quartz (SiO2)
mineral
Carnelian / Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Banded Chalcedony (Agate)
Cryptocrystalline Quartz (SiO2)
mineral
Chalcedony
Cryptocrystalline Quartz (SiO2)
Mineral