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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 $79,444 NZD
$44,775 USD
As of October 29, 2026
Save $45,574 NZD (36%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $125,019 NZD 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 $79,444 to $125,019, a $45,574 spread on the same certified stone. MOH London lists it at $125,019. 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: $125,019 NZD|Low: $73,240 NZD|High: $125,850 NZD|Avg: $92,686 NZD|+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$79,444 NZD
Retailer 12$79,650 NZD
Retailer 6$80,564 NZD
Retailer 8$82,940 NZD
Retailer 3$87,888 NZD
Retailer 7$91,550 NZD
Retailer 10$95,212 NZD
Retailer 2$96,862 NZD
Retailer 4$97,891 NZD
Retailer 11$98,875 NZD
Retailer 5$101,676 NZD
MOH London$125,019 NZD

30 data points across 12 retailers

12 retailers$79,444 NZD to $125,019 NZD

A
Cheapest Retailer
-
$79,444 NZD
$44,775 USD
A
Retailer 2
-
$79,650 NZD
$44,891 USD
View
A
Retailer 3
-
$80,564 NZD
$45,406 USD
View
Final sale: no returns
Retailer 4
-
$82,940 NZD
$46,745 USD
View
Price last confirmed 64 days ago
Retailer 5
-
$82,940 NZD
$46,745 USD
View
Price last confirmed 12 days ago
A
Retailer 6
-
$91,550 NZD
$51,598 USD
View
A
Retailer 7
-
$95,212 NZD
$53,662 USD
View
A
Retailer 8
-
$96,862 NZD
€51,992 EUR
View
Retailer 9
-
$97,891 NZD
$55,172 USD
View
Price last confirmed 14 days ago
Retailer 10
-
$98,875 NZD
$55,726 USD
View
Price last confirmed 9 days ago
A
Retailer 11
-
$101,676 NZD
£45,122 GBP
View
Most Expensive
B+
MOH London
079A733F5 · Oct 29
$125,019 NZD
£55,481 GBP
View
11 more retailers have this diamond
Prices start from $79,444 NZDSave up to $45,574 NZD

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
$79,444 NZD