Back Search for Diamonds
The diamond you have selected is not currently available. For assistance finding one at the same or better quality and price, please call us at 800 242 2728.

0.31-Carat Round Diamond

$648
Summary
Stock number
LD01561971
Price per carat
$2,090
Carat weight
0.31
Shape
Round
Cut
Very Good
Color
E
Clarity
VS2
Length/width ratio
1.01
Depth %
63.7%
Table %
58.0%
Polish
Excellent
Symmetry
Excellent
Girdle
Slightly Thick to Thick, Faceted
Culet
None
Fluorescence
None
Measurements
4.29 x 4.25 x 2.72 mm
All of our certified diamonds are backed by our Diamond Price Guarantee. Learn More
Canadian Diamond
Each Canadian diamond purchased from Blue Nile is accompanied by a Canadian diamond certificate stating the cut, rough weight, polished weight and Canadian certification number.

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.

Sample Photo Diamond Diagram Sample Hearts & Arrows Photo Actual Photo - Approx. 10x
Diamond Grading Report

Find Similar Diamonds

Based on information about this diamond, we can help you find one that will match.

Canadian Diamond
Each Canadian diamond purchased from Blue Nile is accompanied by a Canadian diamond certificate stating the cut, rough weight, polished weight and Canadian certification number.
About Your Blue Nile Diamond

Diamond Size: 0.31 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.

Learn More
.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)
17.9 mm  
.31Ct.
Diamond Selected
.31Ct.
Diamond Selected

Cut: Very Good

Very Good cut: Very slightly less measurable fire or sparkle than an ideal cut diamond, at a more affordable price.

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 Cut

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
Z-N
M-K
J
I
H
G
F
E
D
Noticeable color
Near-colorless
colorless

Clarity: VS2

VS1-VS2: Very slightly included. Minor inclusions ranging from difficult (VS1) to somewhat easy (VS2) to see at 10x magnification.

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 800 242 2728. 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.

Learn More

Blue Nile Diamond Upgrade Program

  • All GIA and AGSL certified 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 may disqualify the diamond from the diamond upgrade program.

Learn More

0.31-Carat Round Diamond