It's mokume gane, Japanese "wood-grained metal" - layers of various alloys of copper, silver and gold, hammered, sanded and oxidized to show off different colors. Cool stuff to work with:)
All theoretical chemistry is really physics; and all theoretical chemists
know it.
-- Richard P. Feynman
cool (Score:2)
the stone is so interesting looking. i like the way you cut it.
Re: (Score:1)