Blue Nile is an online retailer known for its wide selection of fine jewelry, particularly engagement rings and wedding bands. Founded in 1999, it has become a popular choice for couples looking to purchase high-quality diamonds and gemstones at competitive prices. The website offers detailed information about each piece, including the 4Cs of diamonds—cut, color, clarity, and carat weight—helping customers make informed decisions. In addition to engagement rings, Blue Nile also sells a variety of other jewelry items, such as necklaces, earrings, and bracelets. The company prides itself on its exceptional customer service and offers a 30-day return policy, ensuring that shoppers feel confident in their purchases.