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.
Bob Marley - "If she's amazing she won't be easy. If she's easy, she won't be amazing. If she's worth it, you won't give up. If you give up, you're not worthy . Truth is, everybody is going to hurt you; you just gotta find the ones worth suffering for.