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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 $3,494 CAD
As of November 6, 2026
Save $3,342 CAD (49%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $6,836 CAD 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 $3,494 to $6,836, a $3,342 spread on the same certified stone. MOH London lists it at $6,836. 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $6,836 CAD|Low: $3,238 CAD|High: $7,001 CAD|Avg: $4,444 CAD|-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$3,494 CAD
Retailer 10$3,601 CAD
Retailer 2$3,749 CAD
Retailer 11$3,764 CAD
Retailer 7$3,833 CAD
Retailer 6$3,834 CAD
Retailer 9$3,950 CAD
Retailer 4$4,498 CAD
Retailer 3$4,633 CAD
Retailer 5$4,761 CAD
MOH London$6,836 CAD

35 data points across 11 retailers

11 retailers$3,494 CAD to $6,836 CAD

A
Cheapest Retailer
-
$3,494 CAD
A
Retailer 2
-
$3,601 CAD
View
Final sale: no returns
A
Retailer 3
-
$3,749 CAD
View
A
Retailer 4
-
$3,764 CAD
View
A
Retailer 5
-
$3,833 CAD
View
A
Retailer 6
-
$3,834 CAD
View
A
Retailer 7
-
$3,950 CAD
View
A
Retailer 8
-
$4,498 CAD
View
Retailer 9
-
$4,633 CAD
View
Price last confirmed 30 days ago
A
Retailer 10
-
$4,761 CAD
View
Most Expensive
B+
MOH London
9571DD178 · Nov 2
$6,836 CAD
£3,827 GBP
View
10 more retailers have this diamond
Prices start from $3,494 CADSave up to $3,342 CAD

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
$3,494 CAD