Discussion on the paper entitled “Indentation hardness test to estimate the sawability of carbonate rocks” by S. Kahraman and O. Gunaydin. Bull Eng Geol and Environ 67(2008): 507–511. DOI: 10.1007/s10064-008-0162-1 - Saffet Yagiz (Bulletin of Engineering Geology and the Environment, 2009)