Sterling Silver Cushion Tier Halo Ring Sizes 5 to 9 in Various Gemstones Features 9mm, 3.50 carats cushion-cut genuine Swiss Blue Topaz with multiple facets to ensure maximum light and color reflection Flattering and eye-catching design All gemstones and 925-Stamped Sterling Silver metal used are authenticated and as marked. Includes Certificate of Authenticity. For Amazon-fulfilled orders Certificate is available upon request. Birthstone for the month of December Perfect gift for Birthdays, Mothers Day, Valentines, Anniversary, Bridesmaids, Graduation, Christmas or just about any other gift giving occasion.