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.
How to recycle and reuse your favourite wedding gear Give floral table centres to guests as a thank you for their contribution to your big day. If you’re head-over-heels with your beautiful bouquet(Diy Garden Party)