What is "odontolite"

Odontolite \O*don"to*lite\, n. [Odonto- + -lite.] (Min.) A fossil tooth colored a bright blue by phosphate of iron. It is used as an imitation of turquoise, and hence called bone turquoise.

n. (context mineralogy English) A fossil tooth coloured a bright blue by iron phosphate, used as an imitation turquoise.

Odontolite, also called bone turquoise or fossil turquoise or occidental turquoise, is fossil bone or ivory that has been traditionally thought to have been altered by turquoise or similar phosphate minerals such as vivianite.