Tumbled yellow jasper or petrified wood fragment
Microcrystalline quartz (chalcedony), SiO₂, possibly iron-oxide-bearing jasper
mineral
Category
Mineral (Specifically A Variety Of Chalcedony, Which Is A Cryptocrystalline Quartz)
Browse mineral (specifically a variety of chalcedony, which is a cryptocrystalline quartz) specimens identified by the Rock Identifier community.
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Agate
Agate (a cryptocrystalline variety of Quartz, SiO₂)
Mineral
Tumbled chalcedony (likely pale agate or quartz)
Chalcedony, microcrystalline SiO₂
mineral
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Banded Agate (specifically Carnelian Agate)
Silicon dioxide (SiO2) - Chalcedony variety
mineral
Banded Agate (specifically Sardonyx or Carnelian Agate)
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Carnelian
Chalcedony (SiO2)
mineral
Polished banded agate (likely petrified wood)
Microcrystalline quartz (SiO₂); possibly silicified wood
mineral
Tumbled carnelian (likely)
Chalcedony, microcrystalline quartz (SiO₂), orange-brown variety
gemstone
Chert / Flint
Microcrystalline quartz (SiO2)
sedimentary
Jasper
SiO2 (Cryptocrystalline quartz)
mineral
Flint
Silicon dioxide (Microcrystalline Quartz / Chert)
sedimentary
Chalcedony (Banded/Mottled Variety)
Chalcedony (a cryptocrystalline variety of Quartz, SiO2)
Mineral
Chalcedony
Silicon Dioxide (SiO2)
mineral
Lake Superior Agate
Cryptocrystalline Quartz (SiO2)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Dyed Agate Slice
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Agate (specifically Carnelian Agate or Sardagate)
Silicon dioxide (SiO2) - variety of chalcedony
mineral
Yellow Chalcedony
Chalcedony (a cryptocrystalline variety of Quartz, SiO₂)
Mineral
Jasper (specifically Owyhee or Picture Jasper variety)
Jasper (Silicon Dioxide, SiO2)
sedimentary
Black Onyx
Silicon Dioxide (SiO2) with parallel banding
mineral
Polished agate/geode slab
Banded chalcedony (microcrystalline quartz, SiO₂), likely with quartz crystals
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Banded Calcite
CaCO3
sedimentary
Agate (or Chalcedony)
SiO2 (Silicon Dioxide) - a cryptocrystalline variety of quartz
Mineral
Carnelian
Chalcedony (cryptocrystalline quartz), SiO2
Mineral
Tumbled yellow chalcedony (probable)
Chalcedony, microcrystalline quartz (SiO₂), possibly iron-stained jasper
mineral
Agate Slab
Chalcedony (SiO2)
mineral
Chalcedony
Silicon Dioxide (SiO2)
mineral
Druzy Agate (specifically Black Druzy Agate)
Silicon Dioxide (SiO2)
mineral
Carnelian Agate
Silicon Dioxide (SiO2) - Variety: Chalcedony
mineral
Tumbled carnelian agate
Cryptocrystalline quartz (SiO₂), chalcedony variety colored by iron oxides
gemstone
Yellow Jasper
Chalcedony/Quartz (SiO2)
sedimentary
Chert (Nodule fragment)
Silicon Dioxide (SiO2)
sedimentary
Onyx
Chalcedony (SiO2) with parallel banding
mineral
Banded Agate (specifically Carnelian Agate)
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Blue Chalcedony
Chalcedony (Silicon Dioxide, SiO2)
mineral
Orange Quartzite / Carnelian Agate
Silicon Dioxide (SiO2)
metamorphic
Jasper (Iron-stained Chert)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Chalcedony (specifically Agate or Water-worn Quartzite)
Silicon Dioxide (SiO2)
mineral
Tumbled carnelian (red-orange chalcedony)
Carnelian, cryptocrystalline quartz (SiO₂), a variety of chalcedony
gemstone
Polished Jasper (Mushroom Carving)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary