Does the stone increase in size? 28 May, 2024, 10:00 am Last modified: 28 May, 2024, 10:00 am Video of পাথরের গায়ে আবরণ তৈরি করে ক্যালসিয়াম কার্বনেট | The Business Standard Stones are formed from harder rocks. And the calcium carbonate forms a hard coating on the stone. Keep updated, follow The Business Standard's Google news channel TBS Science