R527- 14k Yellow Gold One of a Kind Ring with 6mm Round Blue Zircon. Blue Zircon is a alternative birthstone for December and actually has more sparkle then diamonds. Most all of my jewelry is made using the Lost Wax Method of Casting. Where I make the design in wax and then cast it into gold. To learn more about the complete process you can visit my website for step by step descriptions of the complete process and the amount of work that is in each one of a kind piece.