Boma Jewelry Sterling Silver Letter Envelope Stud Earrings PURE 925 STERLING SILVER - Crafted to stand the test of time. Sterling Silver is a mix of 92.5% silver with alloys to add strength and durability SATISFACTION GUARANTEED - We promise first-class service, including fast & reliable shipping, excellent communication and Amazon's 30 day refund & return policy. QUALITY & WELLNESS - Handcrafted jewelry made by Artisans & Silversmiths in Thailand with a lifetime warranty against manufacturer's defects. .925 Sterling Silver is naturally hypoallergenic, anti-microbial & nickel free, making it ideal for sensitive skin. SHIPS FROM THE UNITED STATES - All Boma Jewelry ships from the United States to ensure quality, reliability and punctuality.