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Round|Natural|IGI

4.01ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 605300501

Certificate IGI 605300501

Diamond specifications and retailer prices

From £12,022 GBP
As of November 5, 2026
Save £9,023 GBP (43%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £21,044 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 605300501. Listed at 13 retailers as of November 4, 2026, with prices from £12,022 to £21,044, a £9,023 spread on the same certified stone. MOH London lists it at £21,044. 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 angle36.5°
Pavilion angle40.8°
OriginNatural
Grading LabIGI
CertificateIGI 605300501
Dimensions10.09 × 10.02 × 6.35 mm
L/W Ratio1.01
Top View
10.09 mm10.02 mm4.01 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 605300501
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 63.1%

Caratlytics Score

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

Price History

Last verified: Nov 5
Current: £21,044 GBP|Low: £12,022 GBP|High: £21,355 GBP|Avg: £15,323 GBP|-1.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 4£12,022 GBP
Retailer 6£13,710 GBP
Retailer 2£14,028 GBP
Retailer 7£14,214 GBP
Retailer 5£14,559 GBP
Retailer 8£15,659 GBP
Retailer 3£16,267 GBP
MOH London£21,044 GBP

40 data points across 8 retailers

13 retailers£12,022 GBP to £21,044 GBP

A
Cheapest Retailer
-
£12,022 GBP
A
Retailer 2
-
£13,710 GBP
View
A
Retailer 3
-
£14,028 GBP
View
Retailer 4
-
£14,173 GBP
View
Price last confirmed 72 days ago
A
Retailer 5
-
£14,559 GBP
View
Retailer 6
-
£14,913 GBP
View
Price last confirmed 8 days ago
A
Retailer 7
-
£15,659 GBP
View
A
Retailer 8
-
£16,156 GBP
View
A
Retailer 9
-
£16,267 GBP
View
B+
Retailer 10
-
£16,581 GBP
View
B+
Retailer 11
-
£16,777 GBP
View
B+
Retailer 12
-
£19,140 GBP
View
Most Expensive
B+
MOH London
2EF3E7210 · Nov 4
£21,044 GBP
View
12 more retailers have this diamond
Prices start from £12,022 GBPSave up to £9,023 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
£12,022 GBP