Thread: Trying to identify old hone. Help appreciated!

Nope, Washita is pretty much exactly the same in composition as a Hard, Black or Translucent Ark. 99% - 99.5% or 99.9% silica, forget which one it is. Actually I'm thinking 99.5% now that I've had a little time to ruminate. Google it if you really need to know. The difference is density. Washitas vary in porosity up to something like 16% IIRC. There are sometimes a few more impurities in some Washitas, and that is where you get the little black "pepper" spots or the "Rosy Red" etc. Some can even contain a little alumina (aluminum oxide). There are even other colors of "Washita" level stone but the best is the white stuff.