Heart|Natural|GIA

1.28ct E SI1 Heart Natural Diamond

EX • E/SI1 • GIA 1505137931

Certificate GIA 1505137931

Diamond specifications and retailer prices

From $2,484 USD
As of November 6, 2026
Save $2,376 USD (49%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $4,860 USD 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 $2,484 to $4,860, a $2,376 spread on the same certified stone. MOH London lists it at $4,860. 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: $4,860 USD|Low: $2,302 USD|High: $4,977 USD|Avg: $3,159 USD|-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$2,484 USD
Retailer 10$2,560 USD
Retailer 2$2,665 USD
Retailer 11$2,676 USD
Retailer 7$2,725 USD
Retailer 6$2,726 USD
Retailer 9$2,808 USD
Retailer 4$3,198 USD
Retailer 3$3,294 USD
Retailer 5$3,385 USD
MOH London$4,860 USD

35 data points across 11 retailers

11 retailers$2,484 USD to $4,860 USD

A
Cheapest Retailer
-
$2,484 USD
A
Retailer 2
-
$2,560 USD
View
Final sale: no returns
A
Retailer 3
-
$2,665 USD
View
A
Retailer 4
-
$2,676 USD
View
A
Retailer 5
-
$2,725 USD
View
A
Retailer 6
-
$2,726 USD
View
A
Retailer 7
-
$2,808 USD
View
A
Retailer 8
-
$3,198 USD
View
Retailer 9
-
$3,294 USD
View
Price last confirmed 30 days ago
A
Retailer 10
-
$3,385 USD
View
Most Expensive
B+
MOH London
9571DD178 · Nov 2
$4,860 USD
£3,827 GBP
View
10 more retailers have this diamond
Prices start from $2,484 USDSave up to $2,376 USD

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
$2,484 USD