From James Avery, this birthstone features: Each delicate cross, made from your choice of sterling silver or 14K gold, is accented with enhanced Blue Zircon. The stone's central placement represents a life centered in Christ. Blue Zircon is the birthstone for December. Sterling silver or 14k gold Enhanced blue zircon approx. 3.5mm round faceted approx. 0.875" long Crafted in America using the world's finest materials. Due to the personalized nature of James Avery bracelets, we are unable to attach charms and customize your design at Dillards.com. Please visit the nearest James Avery store or the James Avery counter at select Dillard's locations to have your new James Avery charm attached at no extra charge. Most local jewelers will also attach the charms for a small fee.