CaratHunter
Plans
Heart|Natural|GIA

1.28ct I SI1 Heart Natural Diamond

ID • I/SI1 • GIA 1553609111

Certificate GIA 1553609111

Diamond specifications and retailer prices

From €1,852 EUR
₹197,076 INR
As of November 2, 2026
Save €2,422 EUR (57%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: €5,151 EUR at NZ Jewellers · As of October 6, 2026
View at NZ Jewellers

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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1553609111. Listed at 12 retailers as of October 26, 2026, with a 131% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
I
Color
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1553609111
Dimensions6.72 × 7.53 × 4.41 mm
L/W Ratio1.12
Girdle conditionThick
Top View
6.72 mm7.53 mm1.28 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1553609111
Side View
Table 58.0%CrownGirdle: MediumPavilionCulet: NoneDepth 58.6%

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 2
Current: €1,852 EUR|Low: €1,796 EUR|High: €4,369 EUR|Avg: €2,567 EUR|-3.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 1€1,852 EUR
Retailer 9€1,953 EUR
Retailer 10€2,181 EUR
Retailer 11€2,264 EUR
Retailer 8€2,399 EUR
Retailer 2€2,563 EUR
Retailer 5€2,604 EUR
Retailer 3€2,761 EUR
Retailer 6€2,995 EUR
Retailer 4€3,042 EUR
Retailer 7€4,274 EUR

32 data points across 11 retailers

12 retailers€1,852 EUR to €4,274 EUR

A
Cheapest Retailer
-
€1,852 EUR
₹197,076 INR
A
Retailer 2
-
€1,953 EUR
$2,182 USD
View
Final sale: no returns
A
Retailer 3
-
€2,181 EUR
$2,437 USD
View
A
Retailer 4
-
€2,264 EUR
$2,529 USD
View
A
Retailer 5
-
€2,399 EUR
$2,680 USD
View
A
Retailer 6
-
€2,563 EUR
$2,863 USD
View
A
Retailer 7
-
€2,604 EUR
£2,291 GBP
View
Retailer 8
-
€2,761 EUR
A$4,745 AUD
View
Price last confirmed 25 days ago
B+
Retailer 9
-
€2,995 EUR
ZAR 54,047 ZAR
View
B+
Retailer 10
-
€3,042 EUR
View
B
Retailer 11
-
€4,274 EUR
£3,760 GBP
View
Most Expensive
NZ Jewellers
54e56388-8c9f-41d1-b62b-9fec14c0741f · Oct 6
€5,151 EUR
$5,755 USD
View
Price last confirmed 26 days ago
11 more retailers have this diamond
Prices start from €1,852 EURSave up to €2,422 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
€1,852 EUR