Odontolite

Odontolite is named after Greek word for toothstone. It is a fossilized tooth or bone substance from prehistoric large animals (such as mammoth, mastodon and dinosaur) which is coloured by the iron phosphate vivianite.

Odontolite resembles turquoise and was called Bone Turquoise in the past.
General Information
Other Names/Trade Names:
Occidental Turquoise
Odontolite Simulants
Ivory which is dyed blue by soaking in a solution of copper sulphate. - Gems, Sixth Edition, Michael O’Donoghue, 2006, p 433
Mohs Hardness
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