Agate
Silicon Dioxide (Chalcedony), SiO2
Category
Browse sedimentary (silicified fossiliferous chalcedony) specimens identified by the Rock Identifier community.
Agate
Silicon Dioxide (Chalcedony), SiO2
Agate
Silicon dioxide (Chalcedony), SiO2
Agate
Silicon Dioxide (Chalcedony), SiO2
Black Onyx
Chalcedony (Silicon Dioxide - SiO2)
Banded Agate
Chalcedony (Silicon Dioxide, SiO2)
Chalcedony (Agate)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Quartz (Chalcedony)
Silicon Dioxide (SiO2)
Grey Chalcedony
Silicon Dioxide (SiO2)
Jasper with Chalcedony
Silicon Dioxide (SiO2)
Chert (River Pebble)
Silicon Dioxide (SiO2)
Agate
Silicon dioxide (Chalcedony), SiO2
Jasper / Yellow Chalcedony Pebble
Silicon Dioxide (SiO2)
Blue Chalcedony
Silicon Dioxide (SiO2)
Blue Lace Agate
Silicon Dioxide (SiO2) - Chalcedony / Quartz
Yellow Jasper
Silicon dioxide (SiO2)
Geode (unopened) or Calcareous Nodule
Siliceous or Calcareous Concretion/Nodule
Chalcedony / Agate Pebble
Silicon Dioxide (SiO2)
Carnelian (Orange Chalcedony)
Silicon Dioxide (SiO2)
Carnelian (Chalcedony)
Silicon Dioxide (SiO2) - variety of Chalcedony
Chalcedony Pebble
Silicon Dioxide (SiO2)
Jasper
Silicon dioxide (SiO2) with iron oxide impurities
Yellow Jasper
Silica (Silicon Dioxide, SiO2) with iron inclusions
Chalcedony (Agate)
Silicon Dioxide (SiO2)
Carnelian (Chalcedony)
Silicon Dioxide (SiO2) with Iron Oxide impurities
Quartz (Chalcedony/Agate nodule)
Silicon dioxide (SiO2)
Beach Pebble / Agate-bearing Chert Pebble
Microcrystalline Quartz (SiO2) with Inclusion Minerals
Quartz Geode Fragment
Silicon Dioxide (SiO2)
Jasper
Silicon Dioxide (Quartz variety, SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Jasper
Silicon dioxide (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Red Jasper (River Stone)
Jasper (Silicon Dioxide, SiO2 plus iron oxide inclusions)
Chalcedony with inclusions (Agate/Quartz)
Silicon Dioxide (SiO2)
Carnelian Agate
Chalcedony (SiO2 with Iron Oxides)
Black Jasper
Silicon Dioxide (SiO2) with impurities
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
Agate (Chert/Chalcedony)
Silicon Dioxide (SiO2)
Chalcedony (Dyed Agate and Citrine-style Quartz)
Silicon Dioxide (SiO2)
Banded Agate
Cryptocrystalline Quartz (SiO2)
Mixed collection of Quartz varieties, Chalcedony, and metamorphic pebbles
Mixed gemstones (primarily Silicon Dioxide - SiO2)
Jasper
Jasper (Silicon Dioxide, SiO2)