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.
Would be great to have each side of the bridal party and the bride and groom front shot and hand them on a wall together. Canvas, no framed Group Photography Ideas: 20 Creative Wedding Poses for Bridal Party