Agatized Fossil or Chalcedony Nodule
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Category
Mineral (Specifically A Variety Of Chalcedony, Which Is Microcrystalline Quartz)
Browse mineral (specifically a variety of chalcedony, which is microcrystalline quartz) specimens identified by the Rock Identifier community.
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Banded Agate (with small Geode cavity)
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Crazy Lace Agate
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Carnelian Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Banded Agate (Tumbled)
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Carnelian Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
Mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Chert (Iron-Stained)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Green Jasper
Silicon Dioxide (SiO2) with iron silicate inclusions
sedimentary
Green Apophyllite
Fluorapophyllite-(K), KCa4(Si8O20)(F,OH)·8H2O
mineral
Aquamarine
Beryl (Be3Al2Si6O18), specifically the blue-green variety
Mineral
Red Jasper
Jasper (Silicon Dioxide with Hematite inclusions), SiO2
sedimentary
Jasper (Iron-rich Microcrystalline Quartz)
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Quartz (Milky/Common)
Quartz (Silicon Dioxide, SiO2)
mineral
Banded Agate with Druzy Quartz
Agate (Silicon Dioxide - SiO2)
mineral
Dyed Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Agate
Banded Chalcedony (SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with impure Iron oxides
sedimentary
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
mineral
Gray Chert (River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Pink Granite
Granite (Felsic Plutonic Rock)
igneous
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite mica)
Mineral
Petrified Wood
Silicified Wood (SiO2)
mineral
Flower Agate (Cherry Blossom Agate)
Chalcedony (Silicon Dioxide) with Opaque Inclusions - SiO2
mineral
Amethyst
Quartz (SiO2) variety
Mineral
Banded Agate
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Carnelian (Orange Chalcedony)
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Chert (varieties: Flint or Chalcedony)
Microcrystalline silica (SiO2)
sedimentary
Jasper (Yellow/Brown)
Silicon Dioxide (SiO2) with impurities
mineral
Banded Agate
Microcrystalline Quartz (SiO2) with impurities
mineral
Ocean Jasper (Orbicular Jasper)
Spherulitic Chalcedony (SiO2)
igneous
Carnelian Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Carnelian (Orange Agate/Chalcedony)
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Blue Lace Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Amazonite
Amazonite (KAlSi3O8)
mineral
Quartzite (River Cobble)
Quartzite (dominant mineral: Quatrz, SiO2)
metamorphic
Jasper
Silicon dioxide (SiO2)
sedimentary
Chert (Yellow Jasper)
Silicon Dioxide (SiO2)
sedimentary