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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 $3,615 AUD
As of November 6, 2026
Save $3,458 AUD (49%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $7,074 AUD 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 $3,615 to $7,074, a $3,458 spread on the same certified stone. MOH London lists it at $7,074. 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: $7,074 AUD|Low: $3,350 AUD|High: $7,244 AUD|Avg: $4,598 AUD|-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$3,615 AUD
Retailer 10$3,726 AUD
Retailer 2$3,879 AUD
Retailer 11$3,895 AUD
Retailer 7$3,966 AUD
Retailer 6$3,967 AUD
Retailer 9$4,087 AUD
Retailer 4$4,654 AUD
Retailer 3$4,794 AUD
Retailer 5$4,927 AUD
MOH London$7,074 AUD

35 data points across 11 retailers

11 retailers$3,615 AUD to $7,074 AUD

A
Cheapest Retailer
-
$3,615 AUD
A
Retailer 2
-
$3,726 AUD
View
Final sale: no returns
A
Retailer 3
-
$3,879 AUD
View
A
Retailer 4
-
$3,895 AUD
View
A
Retailer 5
-
$3,966 AUD
View
A
Retailer 6
-
$3,967 AUD
View
A
Retailer 7
-
$4,087 AUD
View
A
Retailer 8
-
$4,654 AUD
View
Retailer 9
-
$4,794 AUD
View
Price last confirmed 30 days ago
A
Retailer 10
-
$4,927 AUD
View
Most Expensive
B+
MOH London
9571DD178 · Nov 2
$7,074 AUD
£3,827 GBP
View
10 more retailers have this diamond
Prices start from $3,615 AUDSave up to $3,458 AUD

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
$3,615 AUD