Description 750 Gold Hallmark 25 Diamond Stones – Total 0.25 Carat Width 3.5mm Available in Sizes H-V Average Weight 2.9g Presented in Elegant Cardboard Ring Box Eternity Rings were traditionally given as an anniversary gift, but today some use them as wedding rings. The name of the ring comes from the diamonds going around the ring, which symbolises the eternity of marriage.