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Heart|Natural|GIA

1.51ct I SI1 Heart Natural Diamond

ID • I/SI1 • GIA 1535629313

Certificate GIA 1535629313

Diamond specifications and retailer prices

From €3,118 EUR
As of November 6, 2026
Save €3,358 EUR (52%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: €7,223 EUR at NZ Jewellers · As of October 18, 2026
View at NZ Jewellers

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two 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 1535629313. Listed at 19 retailers as of November 4, 2026, with a 108% 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

1.51
Carat
I
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1535629313
Dimensions7.99 × 7.02 × 4.65 mm
L/W Ratio1.14
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
7.99 mm7.02 mm1.51 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1535629313
Side View
Table 58.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 58.2%

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: €3,311 EUR|Low: €3,106 EUR|High: €6,683 EUR|Avg: €4,191 EUR|-3.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 10€3,118 EUR
Retailer 1€3,311 EUR
Retailer 7€3,716 EUR
Retailer 2€3,763 EUR
Retailer 4€3,963 EUR
Retailer 5€4,129 EUR
Retailer 9€4,183 EUR
Retailer 3€4,207 EUR
Retailer 11€4,210 EUR
Retailer 6€4,974 EUR
Retailer 8€6,476 EUR

33 data points across 11 retailers

19 retailers€3,118 EUR to €6,476 EUR

A
Cheapest Retailer
-
€3,118 EUR
A
Retailer 2
-
€3,311 EUR
View
A
Retailer 3
-
€3,716 EUR
View
A
Retailer 4
-
€3,763 EUR
View
Final sale: no returns
B+
Retailer 5
-
€3,843 EUR
View
B+
Retailer 6
-
€3,847 EUR
View
B+
Retailer 7
-
€3,963 EUR
View
B+
Retailer 8
-
€4,068 EUR
View
B+
Retailer 9
-
€4,129 EUR
View
Retailer 10
-
€4,146 EUR
View
Price last confirmed 22 days ago
Retailer 11
-
€4,146 EUR
View
Price last confirmed 22 days ago
Retailer 12
-
€4,146 EUR
View
Price last confirmed 20 days ago
B+
Retailer 13
-
€4,183 EUR
View
Retailer 14
-
€4,207 EUR
View
Price last confirmed 29 days ago
B+
Retailer 15
-
€4,210 EUR
View
Retailer 16
-
€4,785 EUR
View
Price last confirmed 19 days ago
B+
Retailer 17
-
€4,974 EUR
View
B
Retailer 18
-
€6,476 EUR
View
Most Expensive
NZ Jewellers
a8878e84-ef46-4992-b67a-8eceeb60932b · Oct 18
€7,223 EUR
$8,065 USD
View
Price last confirmed 19 days ago
18 more retailers have this diamond
Prices start from €3,118 EURSave up to €3,358 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
1.51ct Heart
€3,118 EUR