Petrified Wood
Silicified Wood (SiO2)
sedimentary
Category
Mineral (Primary Constituent)
Browse mineral (primary constituent) specimens identified by the Rock Identifier community.
Ferruginous Sandstone (Gritstone)
Arenite with Iron-Oxide Cement (SiO2 with Fe2O3 and FeO(OH))
sedimentary
Banded Agate
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Ammonite Fossil
Ammonoidea (Calcium carbonate - CaCO3)
sedimentary
Dragon Blood Jasper
Epidote-containing Quartz Chalcedony (SiO2 with Ca2(Al, Fe)3(SiO4)3(OH))
metamorphic
Amazonite
Potassium Feldspar (Microcline) - K(AlSi3O8)
Mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Agate
Banded Chalcedony (SiO2 - Silicon Dioxide)
mineral
Fossilized Shark Tooth
Fossilised Chondrichthyes dental specimen (likely Otodus or Carcharias sp.)
mineral
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Nuummite
Nuummite (Orthoamphibole rock / Anthophyllite-Gedrite blend)
metamorphic
Sandstone (likely Arkose)
Arenite (Feldspathic Sandstone / Arkose)
sedimentary
Dalmation Stone (frequently called Dalmatian Jasper)
Peralkaline Quartz-Feldspar Rock
igneous
Picture Jasper
Silicified sedimentary or volcanic rock (primarily SiO2)
sedimentary
Banded Agate
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Pink Feldspar
Orthoclase (KAlSi3O8) or Microcline
mineral
Jasper
Jasper (Silicate mineral, SiO2)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Chalcedony on Matrix
Silicon Dioxide (SiO2)
mineral
Ocean Jasper
Orbicular Jasper / Chalcedony (SiO2)
Mineral
Ocean Jasper
Spherulitic Chalcedony (SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Amazonite
Microcline (KAlSi3O8)
mineral
Ocean Jasper (Orbicular Jasper)
Silicon Dioxide (SiO2) with various inclusions
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Fuchsite (Chrome Mica)
K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Lapis Lazuli
Lapis Lazuli (Complex silicate mineral mixture primarily Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Geode with Quartz and Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Limonite Concretion (Goonie or Rattlestone)
Limonite (FeO(OH)·nH2O)
sedimentary
Larimar
Blue Pectolite (NaCa2Si3O8(OH))
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Amazonite
Potassium feldspar (KAlSi3O8)
mineral
Limonite after Marcasite (Propeller Conchoid)
Goethite/Limonite pseudomorph after Marcasite (FeO(OH)·nH2O)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Botryoidal Chalcedony (Agate/Desert Rose Chalcedony)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Druzy Quartz on Limestone
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified wood (primarily SiO2 - Silicon Dioxide/Quartz)
metamorphic
Prase or Green Quartz
Silicon Dioxide (SiO2 with actinolite or chlorite inclusions)
Mineral