We've set the center with fine, bright blue zircon! Blue zircon was the original birthstone for the month of December and was a popular gem until the 1930's when it was thought to have been mined out. Although it is still found in small quantities of small gems, large stones like this one are very rare on the current market.
Metal: 18K White Gold
Gem: Blue Zircon 2.85 Carats
Gem Measurements: 7.7 mm, Round
Ring Size: 5
Marks: "18K" Stamped on the inside band