I've found out that you never have enough sharpening stones. Start hoarding them like me, that way you have too many and can't decide which one to use first. For all around sharpening, your Arkansaw type of stones work good. They vary from very hard, white looking, to very soft, dull brownish/gray. The Indian type of stones do good too. In fact they all do good for their purpose. You will also need to get different grits as you start collecting stones. Diamond impregnated stones have their place, too.