Clay
Bentonite
There is sufficient reliable information and indisputable predictions in different areas, mainly in the Eastern Rhodopes for the exploration and concession of new bentonite deposits.
Refractory clay
In the recent past on the territory of Bulgaria have been studied many and varied in composition and purpose deposits of various types of marble and clay for production of ceramic products. Some of these deposits and nearby prospective areas can be reviewed in accordance with modern requirements, and then sought to obtain a concession for their exploitation.