Martini-Set Round Blue Sapphire Stud Earrings (5mm Blue Sapphire) Martini-Set Round Blue Sapphire Stud Earrings 14K White Gold (5mm Blue Sapphire) Total Carat Weight of Blue Sapphire is 1.2ct. Screw Back Closure Free Certificate of Authenticity. Easy Returns - If you are not 100% satisfied with your purchase, you can return it for a full refund or exchange it within 30 days of the shipping date. Returns, including free gifts, must be unworn and in the state that you received them. Angara offers high-quality gemstone jewelry in a variety of appealing designs. All the gems are sourced directly from mines and manufacturers. The exceptional craftsmanship ensures that every jewelry piece will last for generations.