Round Cut Diamonds

Round is our most popular cut. For almost 100 years, diamond cutters have been using advanced theories of light behaviour and precise mathematical calculations to optimise the fire and brilliance in a round diamond. Round cuts also have the widest variety of setting styles so you can customise to your heart's content.


24 of 171,367 Round Cut Diamonds

FAQs About Round Cut Diamonds

Round cut diamonds take the most raw material to create when they are cut from a rough diamond. While carat weights under .75 are only slightly more expensive than similar fancy cut diamonds, as carat weight increases (especially at the 1 ct. mark), the cost increases more significantly. Learn more in our guide to how diamond shape affects price.

Round cut diamonds are the only shape with cut standards established by the Gemmological Institute of America (GIA). All Blue Nile diamonds are GIA certified. Learn more about GIA diamond grading reports.

Round Cut is by far the most popular diamond shape on Blue Nile. Over 70% of our customers choose a round cut diamond.

Round cut hides inclusions well, so you may be able to save with a lower clarity grade.

Top Round Cut Diamond Reviews

This is a carousel with slides that display a product, review, and image. Use Next and Previous buttons to navigate, or jump to a slide with the bottom slider.

Explore More Round Cut Jewelry

Have questions about Round Cut diamonds?

Get answers day or night.