Sterling Silver Starship Pendant Necklace available in various colored stones 7x5mm oval genuine Amethyst gemstone, 0.75 carat Pendant is crafted out of Sterling Silver and is stamped 925, includes Certificate of Authenticity. For Amazon Fulfilled Orders, Certificate is available upon request. Includes 18 inch Sterling Silver Box style Chain Birthstone for the month of February Perfect gift for Birthdays, Mothers Day, Valentines, Anniversary, Bridesmaids, Graduation, Christmas or just about any other occasion.