Oval Halo Moissanite Engagement Ring and Crown Nesting Bands, Three Crown Cut Moissanite Ring Moissanite Ring, Vintage Crown Design Ring, 0.5CT Round Cut Moissanite Crown Design Wedding Band Ring 6x8mm Oval Cut Moissanite Etsy Oval Cut Moissanite Engagement Ring Set Art Deco MollyJewelryUS. Includes: No certificate of authenticity and limited warranty card with gemological research association (GRA), because a single moissanite has fewer carats (less than 0. 3 carats). A matching box. Style: Minimalist Material: 925 sterling silver, 18K gold plated, Moissanite Care: 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: Circumference 1. 9 in 5: Circumference 2 in 6: Circumference 2. 1 in 7: Circumference 2. 2 in 8: Circumference 2. 3 in Main stone: 0. 3 carat Total: 0. 45 carat Weight: 0. 1 oz (3 g)