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Round|Natural|IGI

4.03ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 613368674

Shape and cutting style on the report: Round brilliant

Certificate IGI 613368674

Diamond specifications and retailer prices

From £12,564 GBP
As of November 4, 2026
Save £7,087 GBP (36%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £19,651 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 4.03ct natural round diamond

This 4.03ct 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 613368674. Listed at 15 retailers as of November 4, 2026, with prices from £12,564 to £19,651, a £7,087 spread on the same certified stone. MOH London lists it at £19,651. 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

4.03
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle41.6°
OriginNatural
Grading LabIGI
CertificateIGI 613368674
Dimensions10.15 × 10.12 × 6.27 mm
L/W Ratio1.00
Culet sizePointed
Top View
10.15 mm10.12 mm4.03 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 613368674
Side View
Table 62.0%Crown 34.8°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 61.9%

Caratlytics Score

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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 4
Current: £19,651 GBP|Low: £12,564 GBP|High: £20,701 GBP|Avg: £15,430 GBP|-5.1%
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
Retailer 14
Retailer 15
November 6, 2026
Retailer 11£12,564 GBP
Retailer 7£12,654 GBP
Retailer 4£12,803 GBP
Retailer 2£13,043 GBP
Retailer 9£13,094 GBP
Retailer 12£13,608 GBP
Retailer 14£13,926 GBP
Retailer 5£14,623 GBP
Retailer 6£15,086 GBP
Retailer 10£15,189 GBP
Retailer 13£15,480 GBP
Retailer 3£15,667 GBP
Retailer 8£15,700 GBP
Retailer 15£17,873 GBP
MOH London£19,651 GBP

36 data points across 15 retailers

15 retailers£12,564 GBP to £19,651 GBP

A
Cheapest Retailer
-
£12,564 GBP
A
Retailer 2
-
£12,654 GBP
View
A
Retailer 3
-
£12,803 GBP
View
A
Retailer 4
-
£13,043 GBP
View
A
Retailer 5
-
£13,094 GBP
View
A
Retailer 6
-
£13,608 GBP
View
Retailer 7
-
£13,926 GBP
View
Price last confirmed 8 days ago
A
Retailer 8
-
£14,623 GBP
View
A
Retailer 9
-
£15,086 GBP
View
A
Retailer 10
-
£15,189 GBP
View
A
Retailer 11
-
£15,480 GBP
View
A
Retailer 12
-
£15,667 GBP
View
A
Retailer 13
-
£15,700 GBP
View
A
Retailer 14
-
£17,873 GBP
View
Most Expensive
A
MOH London
9847CAC73 · Nov 4
£19,651 GBP
View
14 more retailers have this diamond
Prices start from £12,564 GBPSave up to £7,087 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
4.03ct Round
£12,564 GBP