Pottery Barn 12 Gnomes of Christmas Mercury Glass Ornaments. The timeless beauty of mercury glass gives our handcrafted ornament collection its vintage charm. These whimsical gnomes are sure to earn a top spot on the tree each year and make a fun, festive addition tucked into the bow of a wrapped present. Made from glass with iron, resin, plastic and polyester. Hangs from a jute string. Wipe with a soft cloth. Overall: 1.25″ (w) x 2.25″ (d) x 6 (h).