I have also seen similar centerpieces that use epsom salts instead of sugar. You could also sprinkle a mix of pearls/gems. Sand (or sugar), faux pearls, a 3 candle. An easy DIY wedding centerpiece idea.
Take a look at the best wedding themes fall in the photos below and get ideas for your wedding! plum and sage fall nude wedding colors for october brides Image source Fall Wedding Theme – Wedding Colors