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Round|Natural|IGI

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 £33,417 GBP
$44,775 USD
As of October 29, 2026
Save £19,170 GBP (36%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £52,587 GBP 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 £33,417 to £52,587, a £19,170 spread on the same certified stone. MOH London lists it at £52,587. 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
Colour
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: £52,587 GBP|Low: £30,807 GBP|High: £52,937 GBP|Avg: £38,899 GBP|+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£33,417 GBP
Retailer 12£33,504 GBP
Retailer 6£33,888 GBP
Retailer 8£34,887 GBP
Retailer 3£36,969 GBP
Retailer 7£38,509 GBP
Retailer 10£40,050 GBP
Retailer 2£40,743 GBP
Retailer 4£41,176 GBP
Retailer 11£41,590 GBP
Retailer 5£42,768 GBP
MOH London£52,587 GBP

32 data points across 12 retailers

12 retailers£33,417 GBP to £52,587 GBP

A
Cheapest Retailer
-
£33,417 GBP
$44,775 USD
A
Retailer 2
-
£33,504 GBP
$44,891 USD
View
A
Retailer 3
-
£33,888 GBP
$45,406 USD
View
Final sale: no returns
Retailer 4
-
£34,887 GBP
$46,745 USD
View
Price last confirmed 63 days ago
Retailer 5
-
£34,887 GBP
$46,745 USD
View
Price last confirmed 10 days ago
A
Retailer 6
-
£38,509 GBP
$51,598 USD
View
A
Retailer 7
-
£40,050 GBP
$53,662 USD
View
A
Retailer 8
-
£40,743 GBP
€51,992 EUR
View
Retailer 9
-
£41,176 GBP
$55,172 USD
View
Price last confirmed 13 days ago
Retailer 10
-
£41,590 GBP
$55,726 USD
View
Price last confirmed 8 days ago
A
Retailer 11
-
£42,768 GBP
View
Most Expensive
B+
MOH London
079A733F5 · Oct 29
£52,587 GBP
View
11 more retailers have this diamond
Prices start from £33,417 GBPSave up to £19,170 GBP

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
£33,417 GBP