sedimentary
Fossilized Dinosaur Skull (Tyrannosaurus rex)
Tyrannosaurus rex (permineralized fossil), rich in Hydroxylapatite/Silica
Hardness: 5-7 (depending on mineral replacement); Color: brownish-tan to black; Luster: dull to vitreous; Structure: retains the bone's original cellular morphology in a rock matrix.
- Hardness
- 5-7 (depending on mineral replacement)
- Color
- brownish-tan to black
- Luster
- dull to vitreous
Identified More sedimentary →
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Physical properties
Hardness: 5-7 (depending on mineral replacement); Color: brownish-tan to black; Luster: dull to vitreous; Structure: retains the bone's original cellular morphology in a rock matrix.
Formation & geological history
Formed via permineralization where minerals (like silica or calcite) precipitate into organic pores. This specimen appears to be from the Late Cretaceous period (approx. 66-68 million years ago).
Uses & applications
Scientific research, museum display, and high-end private collecting.
Geological facts
T. rex had one of the strongest bite forces of any terrestrial animal. Fossils like this are technically trace/body fossils preserved within sedimentary rock layers like the Hell Creek Formation.
Field identification & locations
Identified by the distinct therapod skull shape, large fenestrae (holes in skull), and serrated teeth. Found primarily in North American badlands.
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