Wait...before you go and spend money on a coticule, what exactly do you want one for and what are you finishing on at the moment?

Remember you are buying a stone blind in way as they can be quite different. If a specific type of coticule or alleged property of one is what you have in mind, it may be worth contacting Bart at Welcome to Coticule.be - home of the famous Belgian Coticule Whetstone and asking for one thats suits you. Bart is able to test the coticule and give you a good analysis of it. Plus hes a world expert in the field.