Petrified Wood
Silicified Wood (SiO2 - Silicon Dioxide)
Category
Browse sedimentary (silicified fossiliferous chalcedony) specimens identified by the Rock Identifier community.
Petrified Wood
Silicified Wood (SiO2 - Silicon Dioxide)
Chrysocolla
Hydrated copper silicates (Cu,Al)2H2Si2O5(OH)4·nH2O
Green Jasper
Silicon Dioxide (SiO2) with iron silicate inclusions
Chalcedony in Limestone Host Rock
Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)
Agate (or Chalcedony)
Silicon Dioxide (SiO2)
Red Jasper
Silicon dioxide with hematite impurities (SiO2 + Fe2O3)
Jasper
Jasper (Cryptocrystalline variety of Quartz, SiO2)
Brown Agate
Silicon Dioxide (SiO2)
Jasper
Silicon dioxide (SiO2)
Jasper
Silicon dioxide (SiO2)
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
Jasper
Silicon Dioxide (SiO2) with impurities (mostly Iron Oxides)
Red Jasper
Jasper (Silica/Silicon Dioxide, SiO2 plus iron inclusions)
Jasper
Silicon Dioxide (SiO2)
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)
Jasper
Silicon dioxide (SiO2)
Red Jasper
Silicon Dioxide (SiO2)
Red Jasper
Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)
Jasper (Iron-stained Chert)
Silicon Dioxide (SiO2) with impurities of Hematite or Goethite
Chalcedony (Botryoidal Agate)
Silicon Dioxide (SiO2)
Chalcedony with inclusions (Agate/Quartz)
Silicon Dioxide (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
Blue Chalcedony
Silicon Dioxide (SiO2)
Chalcedony (Agate)
Silicon Dioxide (SiO2)
Carnelian (Chalcedony)
Silicon Dioxide (SiO2) with Iron Oxide impurities
Chalcedony (Agate)
Silicon Dioxide (SiO2)
Red Jasper
Silicon Dioxide with Hematite impurities (SiO2 + Fe2O3)
Red Jasper
Silicon Dioxide (SiO2) with Iron impurities
Shale (possibly)
Shale (fine-grained clastic sedimentary rock)
Banded Calcite (Mexican Onyx)
Calcite (CaCO3)
Green Jasper
Jasper (Silicon Dioxide, SiO2)
Blue Chalcedony
Silicon Dioxide (SiO2)
Jasper
Jasper (Silicon Dioxide, SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
Chalcedony with Matrix
Silicon Dioxide (SiO2)
Carnelian (Chalcedony)
Silicon Dioxide (SiO2)
Red Jasper (possibly Orbicular)
Silicon Dioxide (SiO2) with iron oxide inclusions
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Banded Calcite (often sold as 'Mexican Onyx' or 'Calcite Onyx')
Calcite (Calcium Carbonate, CaCO3)
Jasper
Silicon dioxide (SiO2)