Petrified Wood
Silicon Dioxide (SiO2) - Calcified / Silicified Wood
Category
Browse mineral and sedimentary specimens identified by the Rock Identifier community.
Petrified Wood
Silicon Dioxide (SiO2) - Calcified / Silicified Wood
Milky Quartz
Silicon Dioxide (SiO2)
Blue Kyanite
Kyanite (Al2SiO5)
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
Jasper
Silicon Dioxide (SiO2)
Kyanite
Kyanite (Al2SiO5)
Pyrite
Iron Sulfide (FeS2)
Pyrite and Sunstone
Iron Sulfide (FeS2) and Plagioclase Feldspar ((Ca,Na)Al(Al,Si)Si2O8)
Carnelian
Carnelian (SiO2)
Garnet
Garnet (X3Y2(SiO4)3)
Chalcedony (Agate/Carnelian type)
Silicon Dioxide (SiO2)
Red Sandstone
Quartz Arenite (with Iron Oxide)
Red Sandstone
Arenite (primarily composed of SiO2 with Fe2O3 cement)
Fossilized Sea Urchin (Echinoid)
Echinoidea (Class) - likely replaced by Calcite or Quartz
Conglomerate
Conglomerate (clastic sedimentary rock)
Sandstone (likely Greywacke or Siltstone variety)
Arenite / Siltstone (primarily SiO2)
Hematite
Iron(III) oxide (Fe2O3)
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Limonite/Goethite staining)
Fossilized Bone Chunk (likely Dinosaur or Large Mammal)
Permineralized Fossil Bone
Red Jasper
Jasper (Silicon Dioxide) - SiO2
White Marble
Recrystallized Calcite (CaCO3)
Chert
Silicon dioxide (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Geode (Unopened)
Siliceous Concretion / Geode
Sandstone (likely Arkosic or Lithic)
Clastic Sedimentary Rock (composed mostly of SiO2)
Sandstone (likely Greywacke variant)
Arenite
Quartz (Milky/Crystal variety)
Silicon Dioxide (SiO2)
Pyrite
Iron Sulfide (FeS2)
Quartz (likely Herkimer Diamond style)
Silicon Dioxide (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Turquoise
Hydrous phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
Hematite
Iron(III) oxide (Fe2O3)
Asphalt Concrete
Bituminous Concrete (Anthropic Rock)
Chert (with Quartz vein/coating)
Microcrystalline Quartz (SiO2)
Sandstone
Arenite (SiO2 primarily)
Sandstone (Ferruginous)
Arenite (SiO2 with iron oxide impurities)
Sandstone (Quartzose)
Arenite (SiO2 based)
Sandstone
Arenite (primarily SiO2)
Bumblebee Jasper
Carbonate-rich volcanic rock containing Sulfur and Arsenic (Realgar/Orpiment)