What is the main constituent of a Pearl
What is the main constituent of a Pearl?
- Calcium carbonate and magnesium carbonate
- Calcium carbonate only
- Calcium sulphate only
- Calcium oxide and calcium sulphate
Answer
The chief component of the nacre that constitutes the pearl is aragonite (CaCO3). Nacre also contains a small amount of conchiolin, a hornlike organic substance (albuminoid) that is the main constituent of the mollusk's outer shell.
The correct option is A.