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.
wine glass used as candle holder. put a flower or decoration under. : wedding black blue brown candle decoration diy flowers gold green ivory navy orange pink purple reception red silver teal white wine glass yellow Candle - Craft ~ Your ~ Home