Clear Quartz / Rock Crystal
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary (Formed From Silica Deposits)
Browse sedimentary (formed from silica deposits) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Formed From Silica Deposits) in the encyclopedia
View all →
Botryoidal Agate / Chalcedony Geode
Silicon Dioxide (SiO2)
mineral
River Pebble (Grey Quartzite / Sandstone Gravel)
Quartz-rich Sedimentary / Metamorphic River Pebble
sedimentary
Chert (Green variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert
Cryptocrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Chert (specifically Flint or Common Opal variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Flint / Chert
Microcrystalline quartz (SiO2)
sedimentary
Agate (Carnelian Agate with Quartz Matrix)
Silicon Dioxide (SiO2)
mineral
Yellow Agate (Banded Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Chalcedony (Agate/Carnelian pebbles)
Cryptocrystalline Quartz (SiO2)
mineral
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint / Banded Chalcedony)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Chalcedony)
Cryptocrystalline Quartz (SiO2)
sedimentary
Jasper (Wonderstone/Banded Jasper)
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary (chemical/biological origin) or volcanic-related metamorphic
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Chalcedony (Agate/Carnelian)
Cryptocrystalline Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint Nodular)
Silicon Dioxide (SiO2)
sedimentary
Chalcedony (Agate/Chert variety)
Silicon Dioxide (SiO2)
mineral
Chert (Nodular Chert)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Common Opal
Hydrated amorphous silica (SiO2·nH2O)
mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper/Agate variety)
Silicon Dioxide (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Brown Jasper (Tumbled)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Chert (Flint) Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Ammonite Fossil
Ammonoidea subclass (calcium carbonate / silica replacement)
fossil
Chert (Jasper and Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Fossilized Shark Tooth
Chondrichthyes tooth
fossil
Petrified Wood
Silicified Wood
fossil
Chert (Yellow Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert / Flint
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Tumbled quartz-rich pebble
Microcrystalline quartz (SiO₂), possibly weathered chert or chalcedony
mineral
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary