It wont take long for you to realize what the limitations of you chisels are. The picture on the right is a chisel 'cutting', the picture on the left is a chisel 'texturing'. They are both the same chisel. To give it a proper name it's a quarter inch tungsten tipped carving chisel and I'm using a 11/2lb carvers dummy and working a piece of limestone.
Tungsten carbide tipped chisels are usually perfect for stones ranging from soft soapstones right through to most types of marble. In the middle of this spectrum are sandstones and limestones. Granite is the top end of the scale and can be carved with tungsten tipped chisels, but this is not recommended at this stage. If you start carving granite now you are not likely to be successful.
