Leaves must be completely dry. Melt beeswax in a double-boiler. Can use old candle stubs. (Optional - add a few drops of cinnamon oil). Hold leaves by the stem and dip in wax. Let excess drip off, then lay them on waxed paper to dry.
Find a paper napkin with fall leaves or other fall motifs and decoupage them onto the stones. It is so easy and the result looks great. Light colored stones are perfect for this project, but you can also paint darker stones white if you like.