White Roses and Baby's Breath Centerpieces in Martini Glasses ~ Your choice of color of Roses - consider gold accents. The Martini Glasses have a lovely shape. You could alternate the flower colors or glass colors Wonderfully simple idea
Will have tall vases filled with water as centerpieces- will either have floating candles if venue allows it, or LED lights. TBD if will have flowers in shorter vase as in this picture, or stem of some other flower in the water in tall vases.
Image detail for -autumn-leaves-wedding-centerpiece. Even though this is a wedding centerpiece, I like it for a Rall centerpiece or Thanksgiving. It is inexpensive. Most people have a hurricane and leaves right outside their door.
Beautiful center pieces or just around the house- rocks, flower of your choice (maybe string it to a rock by the stem so it doesn't float) in a vase, fill with water, add small candle and voila-on the mantle?