There are some really pretty bbw/coti's out there. The main reservation for me about purchasing one is not knowing how to use it effectively. I understand that there is a variance in the natural stones, but I have three questions that have probably been asked many times...

1. Is it possible to establish an approximate grit for the stones?

2. Can any comparisons be made to the norton stones. Ie: bbw = 8k norton (just an example)

3. How would I use them with the stones I already have. Where would i put them in the pecking order.

I understand that these stones may be a luxury...the stone I have work very well. I would just like to get a better understanding of these beauties.