Blue Nile

Blue Nile is an online jeweller best known for diamonds and engagement rings, letting buyers choose a loose diamond and pair it with a ring setting through a build-your-own process. Its catalogue includes natural diamonds and lab-grown diamonds, filterable by cut, colour, clarity and carat, with grading reports from laboratories such as GIA available for many stones. The site also sells wedding bands, earrings, pendants and other fine jewellery, and the company operates a small number of showrooms where customers can view settings. Blue Nile is owned by Signet Jewelers following an acquisition in 2022. It suits buyers who want to research and compare diamonds in detail online. Because purchases are often made without seeing the specific stone in person, buyers should review grading reports, high-resolution images where offered, and the return and resizing policies, which can differ for custom and engraved items.