a fragment of raw granite rock on white background.

rock geology iron boulder soil formation sculpture bedrock art terrain stonewall carving trunk cliff metal piece talc stone talcum clay mineral isolated white background steatite soapstone composed varying proportions combined minerals chlorite carbonate coal black carbon fuel fossil charcoal macro nature granite object natural raw close-up texture power rough industry energy fragment coarse-grained phaneritic intrusive igneous quartz alkali feldspar plagioclase