Fill the bottom of a clear, tall vase with decorative glass rocks. For a medium-sized vase, fill the bottom with about two inches of stones. Adjust this measurement if you have a larger or smaller vase to work with.
Cut the stem of one of your favorite flowers: orchids, roses, hydrangeas and pretty much any other flower that isn’t too delicate will work. The stem should be cut so that the entire bloom can fit comfortably into the vase with a few inches to spare at the top.
Insert the bloom down into the vase and secure the stem in the rocks at the bottom.
Fill the vase with clear water. Be careful to fill the vase slowly so that the petals on the flower stay intact. Fill about one inch from the top of the vase.
Top off your centerpiece with a floating candle on the top. Make sure that you light your candle when the guests sit down to dinner.