discoverynews:

geneticist:

Opalized dinosaur tooth Fossils are normally formed when minerals fill the cellular spaces and crystallize. Opalized fossils, on the other hand, form when bits of silica gel settled into the cracks and fissures of the cellular spaces and form opal. (via)

what sweet tooth!

discoverynews:

geneticist:

Opalized dinosaur tooth Fossils are normally formed when minerals fill the cellular spaces and crystallize. Opalized fossils, on the other hand, form when bits of silica gel settled into the cracks and fissures of the cellular spaces and form opal. (via)

what sweet tooth!

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