Blue Nile is a leading online retailer specializing in certified diamonds and fine jewelry. Established in 1999, Blue Nile offers a wide range of engagement rings, wedding rings, and other jewelry pieces. The company is known for its high-quality diamonds, customizable jewelry options, and competitive pricing. Blue Nile provides a seamless online shopping experience, allowing customers to design their own rings and view them in 360°. The retailer also offers free shipping, free returns, and a diamond price-match guarantee. Blue Nile's commitment to quality and customer satisfaction has made it a popular choice for those seeking elegant and timeless jewelry pieces.