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Heart|Natural|IGI

1.35ct F SI1 Heart Natural Diamond

EX • F/SI1 • IGI 647429821

Shape and cutting style on the report: Cushion brilliant

Certificate IGI 647429821

Diamond specifications and retailer prices

From £2,702 GBP
As of November 5, 2026
Save £1,046 GBP (28%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £5,142 GBP at MOH London · As of October 25, 2026
View at MOH London

About this 1.35ct natural heart diamond

This 1.35ct natural heart sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 647429821. Listed at 11 retailers as of November 5, 2026, with a 39% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.35
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle36°
OriginNatural
Grading LabIGI
CertificateIGI 647429821
Dimensions6.77 × 6.07 × 3.91 mm
L/W Ratio1.12
Girdle conditionFaceted
Culet sizePointed
Top View
6.77 mm6.07 mm1.35 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 647429821
Side View
Table 60.0%Crown 34.9°Girdle: MED-STKPavilion 36°Culet: NoneDepth 64.4%

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 5
Current: £5,142 GBP|Low: £2,598 GBP|High: £5,197 GBP|Avg: £3,591 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 7£2,702 GBP
Retailer 8£2,804 GBP
Retailer 6£2,834 GBP
Retailer 2£2,978 GBP
Retailer 4£3,170 GBP
Retailer 5£3,455 GBP
Retailer 3£3,748 GBP
Retailer 9£5,080 GBP
MOH London£5,142 GBP

32 data points across 9 retailers

11 retailers£2,702 GBP to £3,748 GBP

B+
Cheapest Retailer
-
£2,702 GBP
Retailer 2
-
£2,804 GBP
View
Price last confirmed 12 days ago
B+
Retailer 3
-
£2,834 GBP
View
Final sale: no returns
B+
Retailer 4
-
£2,921 GBP
View
B+
Retailer 5
-
£2,978 GBP
View
B+
Retailer 6
-
£3,170 GBP
View
B+
Retailer 7
-
£3,180 GBP
View
B+
Retailer 8
-
£3,455 GBP
View
B+
Retailer 9
-
£3,748 GBP
View
Retailer 10
-
£5,080 GBP
View
Price last confirmed 29 days ago
Most Expensive
MOH London
05ABB381A · Oct 25
£5,142 GBP
View
Price last confirmed 12 days ago
10 more retailers have this diamond
Prices start from £2,702 GBPSave up to £1,046 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+
1.35ct Heart
£2,702 GBP