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Heart|Natural|GIA

1.28ct E SI1 Heart Natural Diamond

EX • E/SI1 • GIA 1505137931

Certificate GIA 1505137931

Diamond specifications and retailer prices

From £1,856 GBP
As of November 6, 2026
Save £1,775 GBP (49%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,631 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 1.28ct natural heart diamond

This 1.28ct natural heart sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1505137931. Listed at 11 retailers as of November 2, 2026, with prices from £1,856 to £3,631, a £1,775 spread on the same certified stone. MOH London lists it at £3,631. 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

1.28
Carat
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryGood
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 1505137931
Dimensions6.52 × 6.18 × 3.97 mm
L/W Ratio1.06
Cert comments
Clouds are not shown. Pinpoints are not shown.
Key to symbols
Crystal, Feather, Needle
Top View
6.52 mm6.18 mm1.28 ctE / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryGood
FluorescenceStrong
CertificateGIA 1505137931
Side View
Table 61.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 64.3%

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 6
Current: £3,631 GBP|Low: £1,720 GBP|High: £3,718 GBP|Avg: £2,360 GBP|-2.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 8£1,856 GBP
Retailer 10£1,913 GBP
Retailer 2£1,991 GBP
Retailer 11£1,999 GBP
Retailer 7£2,036 GBP
Retailer 6£2,037 GBP
Retailer 9£2,098 GBP
Retailer 4£2,389 GBP
Retailer 3£2,461 GBP
Retailer 5£2,529 GBP
MOH London£3,631 GBP

35 data points across 11 retailers

11 retailers£1,856 GBP to £3,631 GBP

A
Cheapest Retailer
-
£1,856 GBP
A
Retailer 2
-
£1,913 GBP
View
Final sale: no returns
A
Retailer 3
-
£1,991 GBP
View
A
Retailer 4
-
£1,999 GBP
View
A
Retailer 5
-
£2,036 GBP
View
A
Retailer 6
-
£2,037 GBP
View
A
Retailer 7
-
£2,098 GBP
View
A
Retailer 8
-
£2,389 GBP
View
Retailer 9
-
£2,461 GBP
View
Price last confirmed 30 days ago
A
Retailer 10
-
£2,529 GBP
View
Most Expensive
B+
MOH London
9571DD178 · Nov 2
£3,631 GBP
View
10 more retailers have this diamond
Prices start from £1,856 GBPSave up to £1,775 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
1.28ct Heart
£1,856 GBP