Each moissanite jewelry above 0.3 carat is accompanied by a Certificate of Authenticity and a Limited Warranty Card with Gemological Research Association (GRA). Picture style: Ghost mannequin Features: Moissanite, color may be different according to different lights. Material: 925 sterling silver, moissanite, rhodium-plated Care: Avoid wearing during exercise, as sweat will react with the jewelry to produce silver chloride and copper sulfide. 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 9: Circumference 2.4 in 10: Circumference 2.5 in Moissanite: 2 carat