Petrified Wood
Silicified Wood (SiO2)
Category
Browse sedimentary (secondary classification: cryptocrystalline quartz) specimens identified by the Rock Identifier community.
Petrified Wood
Silicified Wood (SiO2)
Chert (and Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert Breccia
Microcrystalline Quartz (SiO2) Breccia
Black Jasper with Quartz
Silicon Dioxide (SiO2) with impurities
Chert (Quartz Variety)
Chert (Silicon Dioxide, SiO2)
Carnelian
Carnelian (SiO2)
Blue Chalcedony
Silicon Dioxide (SiO2)
Blue Dyed Agate
Cryptocrystalline Quartz (SiO2)
Banded Agate
Cryptocrystalline Quartz (SiO2)
Banded Agate
Cryptocrystalline Quartz (SiO2)
Agate
Cryptocrystalline Quartz (SiO2)
Pink Dyed Agate Geode Slice
Cryptocrystalline Quartz (SiO2)
Agate Geode Node
Cryptocrystalline Quartz (SiO2)
Banded Agate
Cryptocrystalline Quartz (SiO2)
Banded Agate
Cryptocrystalline Quartz (SiO2)
Gray Agate with Druzy Quartz Geode
Cryptocrystalline Quartz (SiO2)
Banded Agate
Cryptocrystalline Quartz (SiO2)
Sardonyx
Cryptocrystalline Quartz (SiO2)
Banded Agate (Carnelian variety)
Cryptocrystalline Quartz (SiO2)
Indian Agate
Cryptocrystalline Quartz (SiO2)
Banded Agate
Cryptocrystalline Quartz (SiO2)
Banded Agate (specifically Moss or River Agate variety)
Cryptocrystalline Quartz (SiO2)
Blue Lace Agate
Cryptocrystalline Quartz (SiO2)
Agate
Cryptocrystalline Quartz (SiO2)
Banded Agate
Cryptocrystalline Quartz (SiO2)
Carnelian
Cryptocrystalline Quartz (SiO2)
Banded Agate
Cryptocrystalline Quartz (SiO2)
Banded Agate
Cryptocrystalline Quartz (SiO2)
Gray Agate
Cryptocrystalline Quartz (SiO2)
Agate (Chalcedony slice)
Cryptocrystalline Quartz (SiO2)
Gray Agate
Cryptocrystalline Quartz (SiO2)
Lake Superior Agate
Cryptocrystalline Quartz (SiO2)
Purple Banded Agate
Cryptocrystalline Quartz (SiO2)
Chalcedony (Agate/Chert variety)
Silicon Dioxide (SiO2)
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Turquoise
Turquoise, CuAl6(PO4)4(OH)8·4H2O
Black River Stone (Chert or Basalt Pebble)
Microcrystalline Quartz (SiO2) or Mafic Igneous Rock
Yellow Chert (Gold-colored River Pebble)
Microcrystalline Quartz (SiO2) with Limonite/Goethite staining
Chert (Quartz-rich)
Microcrystalline Silica (SiO2)
Chert (Quartz Variety)
Chert (Silicon Dioxide, SiO2)
Yellow Jasper (Beach Pebble)
Silicon Dioxide (SiO2) with iron hydroxide impurities
Orange Quartzite / Carnelian Agate
Silicon Dioxide (SiO2)