How can you tell if a vintage diamond ring is real?

To tell if a vintage diamond ring is real, you can first research the maker using trusted online resources. Hallmarks found on the inside of the band can provide a starting point for identifying a maker. By reading about the maker, you can find out if they typically produced fine jewelry or costume jewelry. If the maker of your ring was a fine jewelry maker, your ring is more likely to contain a real diamond. Another option is to take your ring to a certified appraiser or experienced jeweler who can assist in identifying the stone. On 1stDibs, shop a diverse assortment of vintage diamond rings.