colored pencil on rocks! (looks like dichroic glass!) SBG thinks you can spray on waterproof sealer and spot them into strategic places in the garden or among potted succulents. Thomas since you love you some colored pencil. and garden.
White painted stones by Natasha Newton - These would make a nifty place card. Just hand your guests a business card with a matching design on it. Then they get to match the card to the rock at their place. They could then take the rock home as a keepsake.