Mixed rock and mineral specimen collection
Multiple species, likely quartz (SiO₂), calcite (CaCO₃), feldspar, chert, and assorted volcanic/sedimentary rocks
mineral
Category
Sedimentary (Silicified Fossiliferous Chalcedony)
Browse sedimentary (silicified fossiliferous chalcedony) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Silicified Fossiliferous Chalcedony) in the encyclopedia
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Red jasper (tumbled)
Jasper, microcrystalline quartz/chalcedony (SiO₂) colored mainly by iron oxides
mineral
Jasper (brecciated or orbicular jasper)
Microcrystalline quartz/chalcedony (SiO₂), colored by iron oxides and other impurities
mineral
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Dalmatian Jasper (or Dalmatian Stone)
Dalmatian Stone (A peralkaline felsite composed of feldspar, quartz, and sodic amphibole)
igneous
Chalcedony (Agate Pebble)
Silicon Dioxide (SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Red Jasper
SiO2 (Silicon Dioxide with Iron Oxide inclusions)
sedimentary
Ironstone Matrix with Jasper / Chert
Ferruginous Chert / Limonitic Jasper (SiO2 with Fe-oxides)
sedimentary
Red Jasper or Carnelian (Agate)
Silicon Dioxide (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with impure Iron oxides
sedimentary
Botryoidal Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Agate (Carnelian / Chalcedony)
Silicon Dioxide (SiO2)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) - Opaque Chalcedony
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions
sedimentary
Druzy Quartz (on Chalcedony/Agate base)
Silicon Dioxide (SiO2)
mineral
Jasper and Agate Mix
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Carnelian
Carnelian (a variety of Chalcedony, SiO₂)
Mineral
Carnelian Beads
Silicon Dioxide (Variety of Chalcedony), $SiO_2$
gemstone
Agate
Silicon Dioxide (SiO2) - variety: Chalcedony
mineral
Banded Agate (specifically Carnelian Agate slice)
Chalcedony (cryptocrystalline variety of Quartz), SiO2
mineral
Carnelian Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Chalcedony (Agate/Carnelian variant)
Silicon Dioxide (SiO2)
mineral
Blue Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Chalcedony (Fire Agate or Carnelian variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Red Jasper
Jasper (a variety of Chalcedony, SiO₂)
Mineraloid (cryptocrystalline quartz)
Banded Jasper (Chert)
Silicon Dioxide (SiO2) - variety of Chalcedony
Sedimentary Rock
Tiger Carving (Banded Onyx or Calcite)
Banded Calcite (CaCO3)
sedimentary
Jasper
Jasper (a variety of Chalcedony, SiO2)
Mineral
Flint or chert
Microcrystalline quartz (SiO₂), commonly with chalcedony
sedimentary
Agate
Silicon dioxide (SiO2) - Chalcedony variety
sedimentary
Lake Superior Agate
Silicon dioxide (chalcedony variety quartz)
sedimentary
Agate
Silicon Dioxide (SiO2) - Chalcedony variety
sedimentary
Lake Superior Agate
Silicon Dioxide (Chalcedony / Quartz), SiO2
sedimentary
Dragon Blood Jasper
Microcrystalline Quartz (Chalcedony) with Epidote and Piemontite
sedimentary
Flint Pebble
Silicon dioxide (microcrystalline quartz / chalcedony)
sedimentary
Jasper
Silicon Dioxide (Microcrystalline Quartz / Chalcedony)
sedimentary
Red Jasper
Chalcedony with Iron Oxide (SiO2 with Fe2O3)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) - variety of Chalcedony
sedimentary
Orange Moss Agate / Carnelian Agate
Silicon dioxide (SiO2) - variety Chalcedony
sedimentary