Guarantee A: Sterling Silver in 18K White Gold Plated, it will never lose color,It will never make your fingers greenGuarantee B: Brilliant NSCD Simulate Diamond, hearts and arrowsGuarantee C: PT950 & Stone weight engraved inside the ringsAnyone who purchase the primary NSCD diamond jewelry in my shop can get life-long warranty and RenovationWe design and produce all the jewelry independently,have an professional production line,The professional master will supervise the process from the design to delivery to promise the quality to achieve our requirementsAs long as you provide the picture,we can produce the item to you accordingly after your confirmation.Also we can produce PT950 platinum, 14K or 18K rose gold, 18K gold, Solid Pt950 platinum or embedded Moissanite jewelry. you can contact us freely if you need an inquire case by case, thank you