Last video

Maybe from the pictures, even without knowing the Italian, you can understand the various steps I do to enhance the color and the stone patina.

It hardly bears repeating since stone enthusiats have heard it MANY times, but adding oils or waxes (wetting agents) to stones is an awful idea.  In more porous stones the wetting agent is quickly absorbed, in less porous stones the wetting agent is slowly absorbed. Ultimately the wetting agent attracts and collects debris which dulls the natural luster of a stone. Even if the stone is scrubbed, the dullness remains.  The dulled stone's luster can only be regained by adding more wetting agent. The build-up of wetting agent and debris turns stones a dull brown, eventually-- and sometimes in only a few months.