CaratHunter
Plans
Heart|Natural|GIA

1.28ct E SI1 Heart Natural Diamond

EX • E/SI1 • GIA 1505137931

Certificate GIA 1505137931

Diamond specifications and retailer prices

From €2,225 EUR
As of November 6, 2026
Save €2,128 EUR (49%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €4,353 EUR 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 €2,225 to €4,353, a €2,128 spread on the same certified stone. MOH London lists it at €4,353. 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: €4,353 EUR|Low: €2,062 EUR|High: €4,458 EUR|Avg: €2,830 EUR|-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€2,225 EUR
Retailer 10€2,293 EUR
Retailer 2€2,387 EUR
Retailer 11€2,397 EUR
Retailer 7€2,441 EUR
Retailer 6€2,442 EUR
Retailer 9€2,515 EUR
Retailer 4€2,864 EUR
Retailer 3€2,950 EUR
Retailer 5€3,032 EUR
MOH London€4,353 EUR

35 data points across 11 retailers

11 retailers€2,225 EUR to €4,353 EUR

A
Cheapest Retailer
-
€2,225 EUR
A
Retailer 2
-
€2,293 EUR
View
Final sale: no returns
A
Retailer 3
-
€2,387 EUR
View
A
Retailer 4
-
€2,397 EUR
View
A
Retailer 5
-
€2,441 EUR
View
A
Retailer 6
-
€2,442 EUR
View
A
Retailer 7
-
€2,515 EUR
View
A
Retailer 8
-
€2,864 EUR
View
Retailer 9
-
€2,950 EUR
View
Price last confirmed 30 days ago
A
Retailer 10
-
€3,032 EUR
View
Most Expensive
B+
MOH London
9571DD178 · Nov 2
€4,353 EUR
£3,827 GBP
View
10 more retailers have this diamond
Prices start from €2,225 EURSave up to €2,128 EUR

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
€2,225 EUR