Human bones and teeth have a crystalline structure and are also made of collagen too.

“Bone mineral is indeed an inorganic, crystalline, solid with a single chemical formula and therefore qualifies as a genuine mineral. The mineral in your bones is called hydroxyapatite and has the chemical formula Ca5(PO4)3(OH). Our bodies build bone mineral on the spot, so we don’t have to swallow hydroxyapatite crystals. But we do have to eat food with enough of the right kinds of atoms to build bone mineral.” source: Dr Christopher S. Baird

Read articles and studies on the New Scientist and the NIH

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