Generally, materials that offer a range of color and firing characteristics and that can be extracted from a single location or several nearby locations are most likely to be profitably used.
(materials; offer; a range of color and firing characteristics) (materials; can be extracted; from a single location or several nearby locations) (materials that offer a range of color and firing characteristics and that can be extracted from a single location or several nearby locations; to be profitably used; )
materials materials materials that offer a range of color and firing characteristics and that can be extracted from a single location or several nearby locations
offer can be extracted to be profitably used
a range of color and firing characteristics
from a single location or several nearby locations