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Blue Nile, Inc. engages in the retail of diamonds and fine jewellery. Its merchandise consists of engagement and non-engagement products. The engagement product category includes gold or platinum engagement rings with a diamond centre stone and loose diamonds. The non-engagement product category includes rings, wedding bands, earrings, necklaces, pendants, bracelets, gifts, and accessories containing precious metals, diamonds, and gemstones or pearls. The company was founded by Ben Elowitz, Mark C. Vadon and Anne Raimondi in 1999 and is headquartered in Bellevue, WA.

Sterling Jewelers, Inc. retails gems and jewelry products. It sells gold, diamond, platinum, silver, watches, collectibles and gifts and gemstone jewelry in the shopping centers and malls. The company was founded in 1919 and is headquartered in Akron, OH.

Sterling, Inc. wholesales christmas decorative products. The company is headquartered in Kansas City, MO.

Diamonds Direct USA, Inc. owns and operates jewelry retail stores. It provides engagement rings and wedding bands. The company was founded in 1995 and is headquartered in Charlotte, NC.

R2net, Inc. develops an e-commerce and supply chain platform for jewellery. Its services include display technology, inventory expansion, and inventory management. The company was founded by Oded Edelman in 2007 and is headquartered in New York, NY.

Part of Signet Jewelers Ltd., Blue Nile LLC is a company that retails jewelry through online. The company is based in Bellevue, WA.