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Round|Natural|IGI

4.01ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 603372310

Shape and cutting style on the report: Round brilliant

Certificate IGI 603372310

Diamond specifications and retailer prices

From £16,942 GBP
As of November 4, 2026
Save £9,250 GBP (35%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £26,192 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 4.01ct natural round diamond

This 4.01ct natural round sits in the three to five carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 603372310. Listed at 13 retailers as of November 4, 2026, with prices from £16,942 to £26,192, a £9,250 spread on the same certified stone. MOH London lists it at £26,192. 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

4.01
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.8°
Pavilion angle40.7°
OriginNatural
Grading LabIGI
CertificateIGI 603372310
Dimensions10.35 × 10.43 × 6.10 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
10.35 mm10.43 mm4.01 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 603372310
Side View
Table 60.0%Crown 32.8°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 58.7%

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: Nov 4
Current: £26,192 GBP|Low: £16,942 GBP|High: £26,713 GBP|Avg: £20,110 GBP|-1.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 4£16,942 GBP
Retailer 7£17,049 GBP
Retailer 2£17,385 GBP
Retailer 10£18,073 GBP
Retailer 12£18,561 GBP
Retailer 5£19,490 GBP
Retailer 9£20,108 GBP
Retailer 8£20,335 GBP
Retailer 11£20,649 GBP
Retailer 3£20,882 GBP
Retailer 6£20,926 GBP
Retailer 13£23,822 GBP
MOH London£26,192 GBP

28 data points across 13 retailers

13 retailers£16,942 GBP to £26,192 GBP

A
Cheapest Retailer
-
£16,942 GBP
A
Retailer 2
-
£17,049 GBP
View
A
Retailer 3
-
£17,385 GBP
View
A
Retailer 4
-
£18,073 GBP
View
Retailer 5
-
£18,561 GBP
View
Price last confirmed 8 days ago
A
Retailer 6
-
£19,490 GBP
View
A
Retailer 7
-
£20,108 GBP
View
A
Retailer 8
-
£20,335 GBP
View
A
Retailer 9
-
£20,649 GBP
View
A
Retailer 10
-
£20,882 GBP
View
A
Retailer 11
-
£20,926 GBP
View
B+
Retailer 12
-
£23,822 GBP
View
Most Expensive
B+
MOH London
1158DA5C2 · Nov 4
£26,192 GBP
View
12 more retailers have this diamond
Prices start from £16,942 GBPSave up to £9,250 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
4.01ct Round
£16,942 GBP