3 Carat Diamonds

To showcase your love in lustrous fashion, shop the selection of 3 carat diamonds available at Blue Nile. These large, loose diamonds make a dazzling, dramatic centre stone in any setting. Keep the look classic with a round brilliant diamond, or choose from our nine fancy-cut diamond options. As you shop our 3 carat selection, prioritize the diamond’s cut grade for the most brilliance.


24 of 1,417 3 Carat Diamonds

FAQs about 3 Carat diamonds

There is a wide variation of price for a 3 carat diamond, depending on the grade of the stone. Three-carat diamonds start around $20,000 and go up to around $124,000 or more.

The shape of the diamond varies the size of the 3 carat diamond. A round 3 carat diamond measures 9.3mm, while a 3 carat marquise-cut diamond measures 14 x 7mm. Our diamond carat size chart helps you compare all the shapes and carat weights.

Of all of the 4 Cs, the most important one to prioritize is cut. Cut refers to the proportions of the facets. An ideal cut maximizes the amount of light reflected through the diamond for brilliance, which is what makes our Astor by Blue Nile™ diamonds so popular.

Get the size of a 3 carat diamond at a lower price by shopping for a diamond with a weight of just under three carats.

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