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0.71-Carat Round Diamond

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0.71-Carat Round Diamond

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Order now for free delivery loose on Wednesday, December 20 or set in jewelry on Thursday, December 21.
Stock number
Price per carat
Carat weight
Length/width ratio
Depth %
Table %
Very Good
Thick to Very Thick
5.51 x 5.48 x 3.60 mm
All of our certified diamonds are backed by our Diamond Price Guarantee. Learn More

Need Help?

Your questions or feedback are always welcome at Blue Nile. Join in a conversation with one of our Diamond and Jewelry Consultants to help you make the right decision.

About Your Blue Nile Diamond

Cut: Good

Good cut: Quality at a lower price than a very good cut, still producing a beautiful diamond for the budget-minded.

Want to learn even more about cut? Learn More

A cut grade is the measure of a diamond's light performance. Cut with proper proportions, light is returned out of the top of the diamond. If it is cut too shallow, light leaks out of the bottom; too deep and it escapes out of the side.

Diamond Size: 0.71 Carat

The international unit of weight used for measuring diamonds and gemstones, 1 carat is equal to 200 milligrams, or 0.2 grams. A specific measurement of a diamond's weight, carat weight alone may not accurately represent a diamond's visual size. Learn More

We recommend considering carat weight along with two other influential characteristics: the overall dimensions and the cut grade of the diamond.

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.25 Ct. (4.1 mm)
.5 Ct. (5.1 mm)
.75 Ct. (5.8 mm)
1 Ct. (6.4 mm)
1.25 Ct. (6.9 mm)
1.5 Ct. (7.4 mm)
1.75 Ct. (7.8 mm)
2 Ct. + (8.1 mm)
dime for scale
17.9 mm  
Diamond Selected
Diamond Selected

Color: E

E color: A "colorless" grade appreciated best set in platinum or white gold. Traces of color difficult for even trained eye to detect.

Want to learn even more about color? Learn More

  • For the purist, look for a colorless diamond with a grade of D-F for a diamond with no discernible color.
  • For an excellent value in a diamond with little or no noticeable color to the unaided eye, look for a near-colorless grade of G-I
Not Carried At Blue Nile
Blue Nile Diamonds
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Noticeable color

Clarity: SI1

SI1-SI2: Slightly included. Inclusions noticeable at 10x. Best value if eye-clean. SI2 inclusions may be detectable to a keen unaided eye.

Want to learn even more about clarity? Learn More

  • Clarity refers to a diamond's relative absence of tiny, natural characteristics known as blemishes and inclusions.
  • Many of these characteristics are microscopic and do not affect a diamond's beauty in any discernible way.
Representative diamond under high magnification.

Diamond Price Guarantee

The Blue Nile Diamond Price Guarantee makes it easy to purchase diamonds with peace of mind. If you find a comparable GIA certified diamond at a lower price, call 1-888-565-7641. If the offer meets our qualifications, we'll match the price. There is no comparison when it comes to the value and quality of Blue Nile diamonds.

The following terms and conditions apply to our Diamond Price Guarantee program.

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Blue Nile Diamond Upgrade Program

  • All GIA and AGSL graded diamonds purchased from Blue Nile are eligible.
  • You will receive credit equal to 100% of the original price toward the purchase of a new diamond.
  • The price of your new diamond must be at least twice the price of your original diamond.
  • Your diamond must be in its original condition with the original diamond grading report.
  • Any damage to the original diamond will disqualify the diamond from the diamond upgrade program.

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Shipping Details

Order by:
4PM EST tomorrow
Receive on:
Wednesday, December 20 loose -or- Thursday, December 21 when set in jewelry
Free shipping via:
FedEx Priority Overnight®
Need a diamond faster?
Order an Astor by Blue Nile™ Diamond before 4PM EST and receive your diamond the next day.

Note: Prices and availability are subject to change without notice. View our terms and conditions for more information. Some limitations may apply to free returns. See our Return Policy for details.

Financing Options

Flexible payment options available with Blue Nile Credit Card. Learn More

  • 6 month financing available for orders of $500 or more.
  • 12 month financing available for orders of $1,500 or more.
  • 48 month financing available for orders of $4,000 or more.††

Subject to credit approval.