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5.31ct I SI2 Round Natural Diamond

EX • I/SI2 • IGI 667406502

Shape and cutting style on the report: Round brilliant

Certificate IGI 667406502

Diamond specifications and retailer prices

From $44,775 USD
As of October 29, 2026
Save $25,686 USD (36%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $70,461 USD at MOH London · As of October 29, 2026
View at MOH London

About this 5.31ct natural round diamond

This 5.31ct natural round sits in the over five carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 667406502. Listed at 12 retailers as of October 29, 2026, with prices from $44,775 to $70,461, a $25,686 spread on the same certified stone. MOH London lists it at $70,461. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

5.31
Carat
I
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle41.1°
OriginNatural
Grading LabIGI
CertificateIGI 667406502
Dimensions11.21 × 11.14 × 6.89 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
11.21 mm11.14 mm5.31 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 667406502
Side View
Table 60.0%Crown 35.3°Girdle: MediumPavilion 41.1°Culet: NoneDepth 61.7%

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: Oct 29
Current: $70,461 USD|Low: $41,278 USD|High: $70,930 USD|Avg: $52,120 USD|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 29, 2026
Retailer 9$44,775 USD
Retailer 12$44,891 USD
Retailer 6$45,406 USD
Retailer 8$46,745 USD
Retailer 3$49,534 USD
Retailer 7$51,598 USD
Retailer 10$53,662 USD
Retailer 2$54,592 USD
Retailer 4$55,172 USD
Retailer 11$55,726 USD
Retailer 5$57,305 USD
MOH London$70,461 USD

32 data points across 12 retailers

12 retailers$44,775 USD to $70,461 USD

A
Cheapest Retailer
-
$44,775 USD
A
Retailer 2
-
$44,891 USD
View
A
Retailer 3
-
$45,406 USD
View
Final sale: no returns
Retailer 4
-
$46,745 USD
View
Price last confirmed 63 days ago
Retailer 5
-
$46,745 USD
View
Price last confirmed 10 days ago
A
Retailer 6
-
$51,598 USD
View
A
Retailer 7
-
$53,662 USD
View
A
Retailer 8
-
$54,592 USD
€51,992 EUR
View
Retailer 9
-
$55,172 USD
View
Price last confirmed 13 days ago
Retailer 10
-
$55,726 USD
View
Price last confirmed 8 days ago
A
Retailer 11
-
$57,305 USD
£45,122 GBP
View
Most Expensive
B+
MOH London
079A733F5 · Oct 29
$70,461 USD
£55,481 GBP
View
11 more retailers have this diamond
Prices start from $44,775 USDSave up to $25,686 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 Round
$44,775 USD