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Heart|Natural|GIA

4.26ct J SI1 Heart Natural Diamond

EX • J/SI1 • GIA 5242046802

Certificate GIA 5242046802

Diamond specifications and retailer prices

From £29,119 GBP
As of November 6, 2026
Save £25,938 GBP (47%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £55,058 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 4.26ct natural heart diamond

This 4.26ct natural heart sits in the three to five carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5242046802. Listed at 20 retailers as of November 4, 2026, with prices from £29,119 to £55,058, a £25,938 spread on the same certified stone. MOH London lists it at £55,058. 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

4.26
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5242046802
Dimensions9.81 × 11.49 × 6.73 mm
L/W Ratio1.17
Girdle conditionFaceted
Top View
9.81 mm11.49 mm4.26 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5242046802
Side View
Table 59.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 58.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £55,058 GBP|Low: £28,871 GBP|High: £55,501 GBP|Avg: £36,549 GBP|+1.7%
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
Retailer 16
Retailer 17
Retailer 18
November 6, 2026
Retailer 18£29,119 GBP
Retailer 4£30,472 GBP
Retailer 17£31,125 GBP
Retailer 6£31,152 GBP
Retailer 2£31,899 GBP
Retailer 7£32,053 GBP
Retailer 14£32,272 GBP
Retailer 3£32,402 GBP
Retailer 13£32,718 GBP
Retailer 16£33,853 GBP
Retailer 8£34,248 GBP
Retailer 15£34,531 GBP
Retailer 5£35,030 GBP
Retailer 9£36,821 GBP
Retailer 11£38,218 GBP
Retailer 10£41,081 GBP
Retailer 12£43,990 GBP
MOH London£55,058 GBP

24 data points across 18 retailers

20 retailers£29,119 GBP to £55,058 GBP

B+
Cheapest Retailer
-
£29,119 GBP
B+
Retailer 2
-
£30,472 GBP
View
Retailer 3
-
£31,124 GBP
View
Price last confirmed 27 days ago
B+
Retailer 4
-
£31,125 GBP
View
B+
Retailer 5
-
£31,152 GBP
View
B+
Retailer 6
-
£31,899 GBP
View
B
Retailer 7
-
£32,053 GBP
View
B+
Retailer 8
-
£32,272 GBP
View
Retailer 9
-
£32,336 GBP
View
Price last confirmed 33 days ago
B+
Retailer 10
-
£32,402 GBP
View
Final sale: no returns
B+
Retailer 11
-
£32,718 GBP
View
B+
Retailer 12
-
£33,853 GBP
View
B+
Retailer 13
-
£34,248 GBP
View
B+
Retailer 14
-
£34,531 GBP
View
B+
Retailer 15
-
£35,030 GBP
View
B
Retailer 16
-
£36,821 GBP
View
B
Retailer 17
-
£38,218 GBP
View
B
Retailer 18
-
£41,081 GBP
View
B
Retailer 19
-
£43,990 GBP
View
Most Expensive
B
MOH London
D2BA167B6 · Nov 4
£55,058 GBP
View
19 more retailers have this diamond
Prices start from £29,119 GBPSave up to £25,938 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.

B+
4.26ct Heart
£29,119 GBP