My CTMH Upline showed me how to do these....although I must say that hers are much better. But since it's my first try, I'll cut myself some slack! :)
These are tumbled marble tiles from Home Depot...I used alcohol ink in three colors to saturate the background of each tile. Then I used Staz-On ink to stamp the sentiment and flourishes. My Upline recommended baking them at 250 degrees for about 20 minutes to set the ink, but since I'm not completely happy with them, I didn't bother! I did spray them with acrylic sealer, just so they didn't ink anything that they may come in contact with. Then I added cork to the bottom.
That's it! Thanks for looking! :)