Instructables
video Petrified Wood Wine Stand
I built this from a chunk of core-drilled petrified wood dug in Southern Oregon.  The wood it self is impressive to look at but combine it with a nice bottle of wine and you have a conversation piece.  I like the way it tuned out even if I can't get it to photograph well.  This concept could be adapted to any similar design just substitute the rock I used for a beautiful piece of wood.