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Discover Blue Nile’s impressive selection of certified, conflict-free diamonds. Create the diamond jewelry of your dreams with Blue Nile loose diamonds.
Use our diamond search feature to find IGI and GIA-graded, conflict-free loose diamonds of the highest quality. Browse thousands of options and use the filters to narrow down the selection by carat, cut, color, clarity, shape and price.
Round cut diamonds are the only shape with cut standards established by the Gemological Institute of America (GIA). All Blue Nile diamonds are GIA certified. Learn more about GIA diamond grading reports.
We offer a wide selection of loose lab created diamonds for sale, with IGI and GIA reporting to help you choose the best fit. Our lab diamonds are available in shapes such as round, princess, emerald, Asscher, cushion, marquise, radiant, oval, pear and heart.
Blue Nile is the world's leading diamond jeweler online for engagement and wedding rings. Expect lower markups and higher quality fine jewelry. Free Shipping and Free Returns.
Build a custom, timeless and beautiful 2 carat diamond ring with Blue Nile’s large selection of certified conflict-free 2 carat diamonds. Choose from lab or natural two carat diamonds for rings and other custom jewelry.
Find fancy colored diamonds in a variety of hues, cuts, carats and shapes. Choose a natural or lab made diamond on its own or add your graded gem to a signature piece of Blue Nile jewelry.
At Blue Nile, we make it easy to design customized 3 carat diamond rings. Simply browse our selection of loose three carat diamonds, select your diamond and select your ring setting. Our experts will handcraft a stunning 3 CT ring with the exact diamond and designs you’re looking for.
Using step-cut facets to emphasize clarity instead of brilliance, Asscher diamonds are sophisticated and unique.
No matter where these diamonds are set, they bring standout style. A marquise cut diamond brings an iconic shape and impressive brilliance. Explore our selection of marquise-shaped diamonds to find the perfect fit for engagement rings, earrings and other styles.