wow those are nice mine is darker, I think it knapps like butter too like obsidion ,wavy flakes and all .I am positive it is extra good rock but it just dont agree with me somehow ,I dont care for black obsidion and it is alot like that to me.now I llove dacite and other types of obsidion ,I however do not want any more gold shheen either, it is the worst type of obsid too me.but I am not the knapper you fellas are either ,it may well come in time.