sedimentary
Dinosaur Fossil (Skull)
Dinosauria fossilis (Petrified Hydroxyapatite / Calcium Carbonate)
Hardness: 3-5 (Mohs), Color: Cream to light brown with tan highlights, Luster: Dull to waxy, Crystal Structure: Amorphous/Microcrystalline, Cleavage: None (conchoidal fracture), Specific Gravity: 2.3–2.9
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Physical properties
Hardness: 3-5 (Mohs), Color: Cream to light brown with tan highlights, Luster: Dull to waxy, Crystal Structure: Amorphous/Microcrystalline, Cleavage: None (conchoidal fracture), Specific Gravity: 2.3–2.9
Formation & geological history
Formed via permineralization or replacement where organic bone matter is replaced by minerals (often quartz or calcite) in sedimentary basins, typically during the Mesozoic Era (66-252 million years ago).
Uses & applications
Scientific research, paleontological study, museum display, and high-end private collection.
Geological facts
Fossils are not actual bone but rocks in the shape of bone. This specimen appears to show a theropod-like skull structure with large fenestrae (openings) to reduce weight without sacrificing strength.
Field identification & locations
Identify by looking for porous 'honeycomb' internal structures (trabecular bone) and specific anatomical features like teeth sockets or fenestrae. Usually found in badlands or areas with exposed sedimentary strata.
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