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.
USE CROWNS Bling Napkin Rings - Baby Shower Table - Oriental Trading. Easy to create bling napkin rings for your pink party theme, girl's baby shower, a bridal shower, engagement party or wedding reception.