DIY TIP: To make your own mercury glass simply spritz glass with water then spray with Krylon "Looking Glass" spray paint and voila! I am a huge fan of mercury glass, I found Christmas Ornament's at big lots.
DIY Wedding Centerpieces - DIY Mercury Glass Centerpiece Vases - Do It Yourself Ideas for Brides and Best Centerpiece Ideas for Weddings - Step by Step Tutorials for Making Mason Jars, Rustic Crafts, Flowers, Modern Decor, Vintage and Cheap Ideas for Coup
33 Ways Spray Paint Can Make Your Stuff Look More Expensive
Spray all of those leftover shells with silver spray paint and you have an expensive looking decorative item! (In the process of completing craft project with spray-painted shells and looks fantastic so far!