Radiant|Lab Grown|IGI

5.31ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG821641122

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG821641122

Diamond specifications and retailer prices

From $10,989 USD
As of November 1, 2026
Save $40,768 USD (79%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $51,757 USD at With Clarity · As of October 31, 2026
View at With Clarity

About this 5.31ct lab-grown radiant diamond

This 5.31ct lab-grown radiant sits in the over five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG821641122 or 821641122. Listed at 11 retailers as of October 31, 2026, with prices from $10,989 to $51,757, a $40,768 spread on the same certified stone. With Clarity lists it at $51,757. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

5.31
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.9°
Pavilion angle33.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821641122
Dimensions12.37 × 8.78 × 5.63 mm
L/W Ratio1.41
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
12.37 mm8.78 mm5.31 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821641122
Side View
Table 65.0%Crown 42.9°Girdle: Slightly ThickPavilion 33.4°Culet: NoneDepth 64.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $19,851 USD|Low: $10,989 USD|High: $51,757 USD|Avg: $22,789 USD|-14.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
With Clarity
November 1, 2026
Retailer 7$10,989 USD
Retailer 9$12,118 USD
Retailer 10$12,304 USD
Retailer 6$12,420 USD
Retailer 5$15,049 USD
Retailer 4$18,180 USD
Retailer 1$19,851 USD
Retailer 3$21,315 USD
Retailer 8$35,046 USD
Retailer 2$37,878 USD
With Clarity$51,757 USD

34 data points across 11 retailers

11 retailers$10,989 USD to $51,757 USD

A
Cheapest Retailer
-
$10,989 USD
A
Retailer 2
-
$12,118 USD
View
A
Retailer 3
-
$12,304 USD
View
A
Retailer 4
-
$12,420 USD
View
A
Retailer 5
-
$15,049 USD
£11,850 GBP
View
A
Retailer 6
-
$18,180 USD
View
B+
Retailer 7
-
$19,851 USD
£15,631 GBP
View
B+
Retailer 8
-
$21,315 USD
€20,300 EUR
View
B
Retailer 9
-
$35,046 USD
View
B+
Retailer 10
-
$37,878 USD
View
Most Expensive
B
With Clarity
821641122 · Oct 31
$51,757 USD
View
10 more retailers have this diamond
Prices start from $10,989 USDSave up to $40,768 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
5.31ct Radiant
$10,989 USD