"Best" is such a relative term, Kees, that I thought I would comment on it. "Best" for what is the key question. There are collectors who only go for the rarest of coticules and those may be stones with beautiful figure OR they may be from a company that sold coticules and only a few examples are still in existence OR they may come in a box with a label that is beautifully preserved and that's what they're interested in. As far as straight razor honing is concerned, the "best" is a select grade coticule either with figure or without and it doesn't have to be "kosher" grade which you will pay an extra 30% for without getting more of a hone as far as a straight razor is concerned.