Perfect
Exactly what I wanted. Band is petit and elegant, and the diamond is beautiful and sparkly. I did the platinum band with a little over 1ctw round Astor Ideal cut.
Garrett W. - Verified Buyer
TODAY WE HAVE 171,367
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
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Petite Twist Diamond Engagement Ring that was reviewed by Garrett W.
Milgrain Marquise and Dot Diamond Engagement Ring that was reviewed by David L.
Beautiful ring!!!
I bought this ring and paired it with a 1.8 CT round diamond. My (now) fiance loves it! She gets nothing but compliments on it, which makes me very happy. In terms of my overall experience with Blue Nile, it was fantastic. I really liked the customization and transparency in terms of being able to pick out which diamond I wanted.
David L. - Verified Buyer
Cathedral Pavé Diamond Engagement Ring that was reviewed by David W.
Perfect Engagement Ring
"Yes!" was the answer. The ring is perfect and carries incredible sparkle. I paired it with a 1.2ct round center diamond. The diamonds in the setting provide beautiful accompaniment to the center piece.
David W. - Verified Buyer
A round diamond sitting on a blue background reflecting in the light.
She loved it!
Purchased a brilliant round 2.04 carat diamond with a petite four prong setting. Amazed at how quickly it was delivered and how readily available and nice the customer service personnel were. She absolutely loves the engagement ring and can't stop staring at it!
Richard Z. - Verified Buyer
Petite Micropavé Diamond Engagement Ring that was reviewed by Joshua O.
She said yes!
The Astor ideal is absolutely brilliant, she absolutely loved the ring. Simple elegance with the micropave band and big sparkling round cut.
Joshua O. - Verified Buyer
