Petrified Wood and Mixed Rocks
Silicified Wood (SiO2)
Category
Browse mineral (organic) specimens identified by the Rock Identifier community.
Petrified Wood and Mixed Rocks
Silicified Wood (SiO2)
Tufa
Calcareous Tufa (CaCO3)
Green Slate or Metamorphic Rock with Moss/Lichen
Metamorphic rock / Phyllite or Slate variant
Amber
Succinite / Fossilized Resin (C10H16O)
Amber
Succinite (Fossilized Resin)
Amber
Succinate (Succinite for Baltic varieties)
Moss Agate
Chalcedony (SiO2) with inclusions of manganese or iron oxides
Amber
Succinite (approximate formula C10H16O)
Amber
Succinite
Dendritic Agate
Silicon Dioxide with Manganese/Iron oxide inclusions (SiO2)
Moss Agate
Chalcedony (Silicon Dioxide, SiO2) with inclusions
Ironstone Concretion (Moqui Marble / Boji Stone)
Sedimentary Iron Oxide Concretion (Fe2O3 / FeO(OH))
Pyrite
Iron Sulfide (FeS2)
Turquoise and Red Coral (with Grizzly Bear Claw)
Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Precious Coral (Corallium rubrum)
Pearls (likely freshwater cultured pearls)
Pearl: nacre, primarily aragonite (CaCO₃) with conchiolin
Blue Apatite
Apatite, Ca5(PO4)3(F,Cl,OH)
Onyx (Black) and Mother of Pearl Inlay
Silicon Dioxide (SiO2) for Onyx; Aragonite (CaCO3) for Mother of Pearl
Unidentified Dark Mineral or Rock
Indeterminate (Likely Silicon Dioxide or Carbon-based)
Agate (Moss or Dendritic Agate)
Chalcedony (Silicon Dioxide, SiO2)
Jasper
Silicon Dioxide (SiO2) with impurities
Blue Apatite
Apatite group (Ca5(PO4)3(F,Cl,OH))
Amber
Succinicum (Organic Gemstone - Resinite)
Red Coral
Corallium rubrum
Jasper
Microcrystalline quartz (SiO2)
Amber (Copal)
Succinite (fossilized resin)
Shark Tooth Fossil
Vertebrate fossilized tooth (various genera such as Carcharodon, Otodus, or Negaprion)
Amber
Succinite (fossilized tree resin)
Shale
Laminated Fissile Pelite
Green Chert
Microcrystalline Quartz (SiO2)
Red Coral (with Hematite and Black Pearl accents)
Corallium rubrum (Calcium Carbonate, CaCO3)
Banded Jasper
Silicate Mineral (Microcrystalline Quartz / SiO2)
Sandstone
Sandstone (SiO2-dominated clastic rock)
Fossilized Bone
Permineralized Vertebrate Fossil
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Amber
Succinite
Amber with Organic Inclusions
Succinite (fossilized resin)
Pyrite (Fool's Gold) in Matrix
Iron Disulfide (FeS2)
Sandstone
Sandstone (Siliciclastic Sedimentary Rock)
Blue Apatite
Calcium Phosphate (Ca5(PO4)3(F,Cl,OH))
Sandstone
Arenite
Sandstone
Arenite
Pyrite in Matrix (Fool's Gold)
Iron Disulfide (FeS2)