1. Physical Properties:
CaCO3 or Calcium Carbonate in the form of Calcite is what Coral is. This comes from Calcareous skeletons of colonies of marine organisms of the phylum Cnidaria.

2. Appearance:
It is a soft material which can be easily cut and polished and given shapes as per desire.

3. Uses:
This is used with considerable success in problems which are difficult to understand by the doctors. This gives a person capacity to speak with authority and its regular facial expression. This also helps in the strength to bear unpleasant happenings and understand the working of other people's minds.