Although there is a crossover between granite and marble tools, certain tool qualities are particularly well-suited to softer stone. Softer stone can be gouged, which makes a tooth chisel an appropriate roughing out tool. Because the stone is not brittle, blades and teeth can be kept fairly sharp without as much risk of breakage. Both carbide-tipped and steel tools are appropriate for working softer stone. Carbide will last longer and require less maintenance (for carbide tool maintenance see Tech Tips). Our marble Cutting Chisels and Tooth Chisels are made using 1/2" square material rather than the heavier stock used in the past, resulting in significant weight reduction. For example, our 3" blade Marble Cutting Chisel weighs 12 oz. as opposed to 22 oz--the lightest available anywhere. Choose a "Type B" or short-stroke pneumatic hammer when working in softer stone. With their lighter impact, these carving tools will have less tendency to "bruise" your stone.
Article Source:
http://www.trowandholden.com/