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.
Pearl Beads on Rustic Wire Garland Perfect by SoireeSupply. This beautiful pearl beaded garland will add an understated shine to any decoration or DIY project. Easy to bend rustic wire. between each bead.