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Round|Natural|GIA

4.02ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6552158859

Certificate GIA 6552158859

Diamond specifications and retailer prices

From £26,372 GBP
As of November 4, 2026
Save £26,808 GBP (50%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £53,180 GBP at With Clarity · As of November 4, 2026
View at With Clarity

About this 4.02ct natural round diamond

This 4.02ct 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 GIA 6552158859. Listed at 11 retailers as of November 4, 2026, with prices from £26,372 to £53,180, a £26,808 spread on the same certified stone. With Clarity lists it at £53,180. 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

4.02
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6552158859
Dimensions10.14 × 10.18 × 6.31 mm
L/W Ratio1.00
Girdle conditionFaceted
Key to symbols
Feather, Cloud, Crystal, Needle
Top View
10.14 mm10.18 mm4.02 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552158859
Side View
Table 58.0%Crown 35.5°Girdle: MediumPavilion 41°Culet: NoneDepth 62.1%

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: £26,484 GBP|Low: £26,372 GBP|High: £53,180 GBP|Avg: £34,347 GBP|+0.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 3£26,372 GBP
Retailer 1£26,484 GBP
Retailer 6£30,889 GBP
Retailer 4£32,417 GBP
Retailer 5£36,035 GBP
Retailer 7£36,808 GBP
Retailer 2£47,944 GBP

30 data points across 7 retailers

11 retailers£26,372 GBP to £53,180 GBP

A
Cheapest Retailer
-
£26,372 GBP
A
Retailer 2
-
£26,484 GBP
View
Retailer 3
-
£29,081 GBP
View
Price last confirmed 27 days ago
Retailer 4
-
£30,889 GBP
View
Price last confirmed 14 days ago
Retailer 5
-
£32,064 GBP
View
Price last confirmed 20 days ago
B+
Retailer 6
-
£32,417 GBP
View
B+
Retailer 7
-
£32,417 GBP
View
Retailer 8
-
£35,393 GBP
View
Price last confirmed 22 days ago
Retailer 9
-
£36,808 GBP
View
Price last confirmed 19 days ago
B
Retailer 10
-
£47,944 GBP
View
Most Expensive
B
With Clarity
6552158859 · Nov 4
£53,180 GBP
$71,575 USD
View
10 more retailers have this diamond
Prices start from £26,372 GBPSave up to £26,808 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
4.02ct Round
£26,372 GBP