Sterling Silver Keepsake Ring Sizes 5 to 9 in various gemstones Features 8x6mm, 1 carat oval genuine Aquamarine with multiple facets to ensure maximum light and color reflection Trendy yet very feminine halo 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 March Perfect gift for Birthdays, Mothers Day, Valentines, Anniversary, Bridesmaids, Graduation, Christmas or just about any other gift giving occasion.