Pearl comprises ______ calcium carbonate.
موتی ______ کیلشیم کاربونیٹ پر مشتمل ہوتا ہے۔
Answer: 90%
Explanation
Pearl comprises 90% calcium carbonate.
- The majority of a pearl's structure is made of calcium carbonate in a crystalline form.
- This composition gives pearls their hardness and smooth texture.
