Includes: Moissanite jewelry over 0.3 carats includes a certificate of stone properties. Limited warranty included, please contact us for any issues related to your purchase. Material: 925 sterling silver, Platinum-plated, Moissanite Carat weight: 1 Care instructions: Avoid wearing during exercise, as sweat will react with the jewelry to produce silver chloride and copper sulfide, which causes the jewelry to deteriorate and corrode over time. Imported Product measurements: 4.5: Circumference 1.96 in5: Circumference 2 in6: Circumference 2.1 in7: Circumference 2.2 in8: Circumference 2.3 in9: Circumference 2.4 inMain stone: 1 caratWeight: 3 oz (85 g)