so I'm guessing the platter you want to be sonicly dead? which must be why the shot filled acrylic is the rage. If so, and I wanted to keep the stone theme going, Id have better luck with a sandstone for the platter. It would have a less crystaline structure. I suppose I would coat it with surfboard resin. If I do this I will be calling on you all alot in the near future to share your expertise.