Agate
Silicon Dioxide (Chalcedony), SiO2
Category
Browse mineralish (variety of chalcedony) specimens identified by the Rock Identifier community.
Agate
Silicon Dioxide (Chalcedony), SiO2
Banded Jasper
Silicon Dioxide with Iron Oxide impurities (SiO2)
Jasper River Stone
Silicon Dioxide (SiO2) with iron oxide inclusions
Green Jasper
Silicon Dioxide (SiO2) with iron silicate inclusions
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite inclusions
Jasper River Stone
Silicon Dioxide (SiO2) with iron oxide inclusions
Yellow Jasper
Silicon Dioxide with Limonite (SiO2 + FeO(OH)·nH2O)
Yellow Chalcedony (Agate/Carnelian)
Silicon Dioxide (SiO2)
Jasper
Silicon dioxide (SiO2) with impurities
Red Jasper
Jasper (Silicon Dioxide, SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Yellow Jasper
Silicon Dioxide (SiO2) with goethite or limonite inclusions
Yellow Jasper
Silicon Dioxide (SiO2) with iron inclusions
Chert (Jasper variety)
Microcrystalline Quartz (SiO2)
Gray Agate
Cryptocrystalline Quartz (SiO2)
Red Jasper
Silicon Dioxide (SiO2) containing Iron Oxide impurities
Agate
SiO2
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Tumbled chalcedony (likely carnelian or common agate)
Microcrystalline quartz, SiO₂; chalcedony variety
Yellow Jasper
Silicon Dioxide (SiO2)
Ocean Jasper
Spherulitic Chalcedony (SiO2)
Ocean Jasper
Orbicular Jasper (variety of Chalcedony)
Tumbled blue chalcedony/agate (likely glassy silica material)
Microcrystalline quartz, SiO₂; possibly blue chalcedony or dyed agate
Agate
SiO2 (Chalcedony/Quartz)
Banded Agate
Chalcedony (SiO2) with impurities
Tumbled carnelian agate
Cryptocrystalline quartz (SiO₂), chalcedony variety with iron-oxide coloration
Agate and Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Crazy Lace Agate
Silicon Dioxide (SiO2) with iron and aluminum inclusions
Jasper
Jasper (Silicon Dioxide, SiO2)
Tumbled jasper or jasper-rich chert
Microcrystalline quartz (SiO₂) with iron-oxide impurities
Tumbled carnelian
Carnelian, orange-red chalcedony (microcrystalline quartz, SiO₂)
Tumbled Agate
Silicon Dioxide (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
Red Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides
Yellow Jasper
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)
Yellow Agate
Silicon Dioxide (SiO2)