It's not Obsidean, but Dacite. I cut the slabs myself so I could get a dozen almost matched points. And I don't like to waste rock that I can't get for free. Frank, That white blade is old decoglass used as paneling on the sides of buildings around the turn of the century to the 20's. I've never seen it in the white till Jamie sent me some. I have it in green, tan and dark purple. It is very clean and knaps like Obsidean. After breaking that many points I went to something easy to finish the day.