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.
Place 2 stems of the same color gladiola stems in a tall cylinder vase to create a dramatic and budget friendly centerpiece for a wedding or other special event. Be sure to give the gladiolas time to open. redcenterpiece by lizzie
Submerged Calla Lilly Centerpieces: I could also show you a couple of pieces with water pearls that might be a good idea. This is simple and elegant. I LOVE THIS CAN ONE OF YOU DO THIS? with purple calla lilies and white candles