Chalcedony (Agate/Seashell replacement)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Category
Sedimentary (Fossilized)
Browse sedimentary (fossilized) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Fossilized) in the encyclopedia
View all →
Kambaba Jasper
Stromatolite / Fossilized Algae (Rhyolitic structure)
sedimentary
Ironstone Concretion / Chert Nodules
Iron-rich Sedimentary Concretion (Fe2O3 / SiO2 mix)
sedimentary
Rough amber-like brown mineral specimen
Uncertain from photograph; possibly iron-stained quartz, common opal, or resinous amber
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Fossiliferous Limestone
Calcium carbonate matrix with macrofossils (CaCO3)
sedimentary
Coal
Coal (Combustible sedimentary rock)
sedimentary
Amber (Copal)
Fossilized Tree Resin (C10H16O)
mineral
Sandstone
Arenite
sedimentary
Fossilized Shark Tooth
Chondrichthyes (class) fossilized tooth
fossil
Sandstone Concretion
Clastic sedimentary rock (primarily Silica, SiO2, or Calcium Carbonate, CaCO3)
sedimentary
Fossilized Shark Tooth
Chondrichthyes (Class) fossilized tooth
fossil
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Fossil-bearing sedimentary rock, possibly fossil wood or bone
Indeterminate silicified/carbonate fossil in sandstone or mudstone
fossil
Limpets Shell / Fossil Specimen
Patellogastropoda (Class)
fossil
Fossilized bivalve in sandstone/conglomerate
Indeterminate fossil mollusk, likely Bivalvia, preserved in lithified siliciclastic sediment
fossil
Mookaite Jasper
Radiolarite (SiO2)
sedimentary
Greywacke with Quartz Vein
Matrix: Impure Sandstone (SiO2 + varied clasts), Veins: Quartz (SiO2)
sedimentary
Flint / Chert (Fossiliferous)
Silicon dioxide (SiO2) with microcrystalline quartz
sedimentary
Kambaba Jasper
Rhyolite (with Stromatolite fossil inclusions)
sedimentary
Amber
Succinite (fossilized resin); C10H16O
mineraloid
Probable fossilized coral
Fossil coral; exact coral group and species cannot be determined from the image
fossil
Fossilized Bone / Dinosaur Fossil
Fossilized vertebrate bone (permineralized)
fossil
Fossil Coral
Cnidaria fossil (often Calcium Carbonate / CaCO3)
sedimentary
Sandstone Pebble
Arenite (SiO2 complex)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Sandstone
Arenite (SiO2 variety)
sedimentary
Fossilized Brachiopod Shell Fragment
Brachiopoda (Class: Rhynchonellata or Strophomenata)
fossil
Fossilized Oyster Shell
Ostreidae (Calcium Carbonate - CaCO3)
fossil
Fossilized oyster or bivalve shell
Fossil Gryphaeidae or Ostreoidea; calcitic shell, CaCO₃
fossil
Fossiliferous Sandstone
Sedimentary rock containing invertebrate fossils
fossil
Fossil Shell
Invertebrate fossil (Mollusca)
fossil
Kambaba Jasper
Stromatolite Jasper (Microcrystalline Quartz with Cyanobacteria fossile)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Fossilized Bone Chunk (likely Dinosaur or Large Mammal)
Permineralized Fossil Bone
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Coal (Bituminous Coal)
Caustobiolith / Sedimentary Rock
sedimentary
Fossilized Brachiopod or Gastropod
Phylum Brachiopoda / Phylum Mollusca
fossil
Amber (Copal)
Succinate (Fossilized Tree Resin)
mineraloid
Fossilized Bone Fragment
Vertebrate Fossil Material (Apatite/Calcium Phosphate)
fossil
Sea Urchin Fossil
Echinoidea (test/fossil)
fossil