Answers

2015-11-07T01:59:22+05:30
It is hard part of teeth is which is visible and is made up of calcium phosphate. Hope it helps and pls mark as the best answer. :)
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2015-11-07T09:01:39+05:30
The hard enemal layer(outer layer) is made up of calcium phosphate(hard crystal).

hope this helps u.
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