Murex Fossil
Muricidae (Calcium Carbonate fossilization)
fossil
Category
Sedimentary (With Some Aspects Of Mineral Replacement)
Browse sedimentary (with some aspects of mineral replacement) specimens identified by the Rock Identifier community.
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Rhodochrosite
Rhodochrosite, Manganese Carbonate (MnCO3)
mineral
Fossilized Shark Tooth (Otodus)
Otodus sp. (calcium phosphate/hydroxylellite)
sedimentary
Calamites
Calamites (Pith cast fossil)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Tooth or shell fragment (likely fossilized marine material)
Indeterminate; possibly a fossil fish tooth or mollusk shell fragment composed mainly of calcium carbonate (CaCO₃)
fossil
Fossil Shell
Phylum Mollusca (Bivalvia or Brachiopoda)
fossil
Probable fossilized coral
Fossil coral; exact coral group and species cannot be determined from the image
fossil
Fossilized bivalve shell
Bivalvia indeterminate; likely a preserved clam or cockle shell, composed mainly of calcium carbonate (CaCO₃)
fossil
Jasper
Microcrystalline quartz (SiO2)
sedimentary
Botryoidal Chalcedony
Silicon Dioxide (SiO2)
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Banded Jasper (Mookaite / Chert)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Polished amber-colored stone, possibly chert or jasper
Uncertain from image; likely microcrystalline quartz (SiO₂) if chert/jasper
mineral
Red Tiger's Eye
SiO2 (Silicon Dioxide) - Pseudomorph of Quartz after Crocidolite
mineral
Banded Jasper
Silicate Mineral (Microcrystalline Quartz / SiO2)
sedimentary
Fossilized Bivalve Shell
Bivalvia (fossil specimen)
sedimentary
Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Tumbled jasper
Microcrystalline quartz (chalcedony), chiefly SiO₂, colored by iron oxides and other impurities
mineral
Polished fossil gastropod shell
Fossilized gastropod (snail) shell; exact taxon cannot be determined from the image
fossil
Triceratops Fossil
Triceratops horridus
fossil
Orbicular jasper (orbicular chert)
Silica-rich microcrystalline quartz, SiO₂; orbicular jasper/chert with concentric silica bands
sedimentary
Fossilized Shark Tooth (Partial) or Coprolite
Elasmobranchii (fossil) or Coprolite (trace fossil)
fossil
Brachiopod Fossil
Phylum Brachiopoda
fossil
Brecciated Jasper or Agatized Dinosaur Bone
SiO2
gemstone
Tiger's Eye
Quartz pseudomorph after crocidolite (SiO2)
gemstone
Fossil Shark Tooth
Lamniformes (order) - likely Cretalamna or Carcharias species
fossil
Galena
Lead(II) sulfide (PbS)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Green Jasper / Chert
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
gemstone
Pyrite
Iron Sulfide (FeS2)
mineral
Chert (Limestone-based)
Silicon Dioxide (SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Chalcedony (Common Opal variant)
Silicon dioxide (SiO2) with varying levels of hydration
mineral
Tumbled jasper or iron-rich chert
Microcrystalline quartz (SiO₂), likely colored by iron oxides
mineral
Galena
Lead(II) sulfide (PbS)
mineral
Jasper
Silicon dioxide (SiO2)
Mineral / Sedimentary
Chalcedony on Matrix
Silicon Dioxide (SiO2)
mineral
Fossilized Dinosaur Skull (Tyrannosaurus rex)
Tyrannosaurus rex (permineralized fossil), rich in Hydroxylapatite/Silica
sedimentary
Dinosaur Fossil (Tyrannosaurus rex skull replica/specimen)
Tyrannosaurus rex (fossilized in permineralized sedimentary matrix)
sedimentary