bone turquoise

American  

noun

1. fossil bone or ivory that has been colored naturally or artificially so as to resemble turquoise.

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bone turquoise British  

noun

1. Also called: odontolite.  fossilized bone or tooth stained blue with iron phosphate and used as a gemstone

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Example Sentences

So that around the bones there eventually appears a beautiful turquoise casing; the bone centre is also coloured like its casing, though not entirely losing its bony characteristics, so that it really forms a kind of ossified turquoise, surrounded by real turquoise, and this is called the "bone turquoise" or "odontolite."

From Project Gutenberg