Then all you do is bake the tiles for about 30 minutes at 250. Let them cool in the oven. The images are now permanent and you don't need to seal them. The tiles will be slightly absorbent, but nothing like those thirsty stone ones.
To protect table surfaces, use can use felt, cork, or those furniture protective thingies (don't know what they're called, but they're on the bottom of all of my chairs and tables to protect my wood floor). On these I used some cork coasters from Ikea. You can get 12 for $1 or something ridiculously cheap. Use Tacky Glue to adhere them.
The tiles that I use are Botticino Tumbled Marble tiles that I get at Lowe's.
'Til next time...Happy Stamping!