Petrified Wood
Silicified Wood (primarily SiO₂ / Silicon Dioxide)
mineral
Category
Mineral (Silicate Replaced Organic Material)
Browse mineral (silicate replaced organic material) specimens identified by the Rock Identifier community.
Learn about Mineral (Silicate Replaced Organic Material) in the encyclopedia
View all →
Petrified Wood
Silicified Wood (primarily Quartz or Chalcedony, SiO2)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Dinosaur Fossil Tooth
Vertebrate Fossilized Tooth
fossil
Fossil Coral
Scleractinia or Anthozoa (Fossilized)
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Jasper
Microcrystalline Quartz (SiO2)
Sedimentary/Mineral
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil
Tumbled brown mineral pebble, possibly jasper or weathered quartzite
Indeterminate from the blurred image; likely microcrystalline quartz (SiO₂) if jasper, or quartzite dominated by quartz
mineral
Starfish Fossil
Asteroidea fossil
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Weathered iron-rich rock, possibly garnet schist or mica schist
Foliated metamorphic rock; likely mica schist with iron oxides and quartz, but exact identification is uncertain from the image
metamorphic
Weathered limestone or calcareous fossil fragment
Calcite-rich carbonate rock (CaCO₃), possibly fossiliferous limestone
sedimentary
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
sedimentary
Green Chert (Jasper)
Microcrystalline Quartz (SiO2) with chlorite/epidote inclusions
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Chert (Jasper/Chalcedony mix)
Microcrystalline Quartz (SiO2)
sedimentary
Fossilized Bivalve Shell
Class Bivalvia (fossilized)
fossil
Petrified Wood
Silicified wood (primarily SiO2)
fossil
Mammoth Tooth
Mammuthus primigenius (Tooth fragment)
fossil
Petrified Wood
Silicified wood (primarily SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Fossil Shark Tooth
Selachii (fossilized dentition)
fossil
Bivalve Fossil (Fossilized Shell)
Class Bivalvia (fossilized in Calcium Carbonate/Aragonite)
fossil
Fossil Shark Tooth
Selachimorpha (Chondrichthyes dental fossil)
sedimentary
Fossilized Shark Tooth
Chondrichthyes (Class) - likely Carcharodon or Otodus genus
fossil
Fossil Shark Tooth (Sand Tiger Shark type)
Carcharias sp. (likely Odontaspis)
fossil
Bivalve Fossil in Sedimentary Matrix
Fossiliferous Mudstone (Class: Bivalvia)
sedimentary
Petrified Wood
Silicified Wood (SiO2 permineralization)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Fossilized Bone
Permineralized Bone (Vertebrate Fossil)
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Chalcedony in Matrix (likely Agatized Coral or Chert)
Silicon Dioxide (SiO2)
sedimentary
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Chert (Green Jasper)
Microcrystalline Quartz (SiO2) with iron silicate inclusions
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony/Opal replacing organic matter)
sedimentary
Shark Tooth Fossil
Vertebrate fossilized tooth (Chondrichthyes)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Petoskey Stone
Hexagonaria percarinata (Calcite / CaCO3)
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Mammoth or Mastodon Tooth Fragment
Mammuthus / Mammut molar fragment
fossil