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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 $3,481 USD
As of November 6, 2026
Save $3,749 USD (52%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $8,065 USD 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
Color
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: $3,697 USD|Low: $3,468 USD|High: $7,462 USD|Avg: $4,679 USD|-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$3,481 USD
Retailer 1$3,697 USD
Retailer 7$4,149 USD
Retailer 2$4,201 USD
Retailer 4$4,425 USD
Retailer 5$4,610 USD
Retailer 9$4,670 USD
Retailer 3$4,697 USD
Retailer 11$4,701 USD
Retailer 6$5,553 USD
Retailer 8$7,230 USD

33 data points across 11 retailers

19 retailers$3,481 USD to $7,230 USD

A
Cheapest Retailer
-
$3,481 USD
A
Retailer 2
-
$3,697 USD
View
A
Retailer 3
-
$4,149 USD
View
A
Retailer 4
-
$4,201 USD
View
Final sale: no returns
B+
Retailer 5
-
$4,291 USD
View
B+
Retailer 6
-
$4,295 USD
View
B+
Retailer 7
-
$4,425 USD
View
B+
Retailer 8
-
$4,542 USD
View
B+
Retailer 9
-
$4,610 USD
View
Retailer 10
-
$4,629 USD
View
Price last confirmed 21 days ago
Retailer 11
-
$4,629 USD
View
Price last confirmed 21 days ago
Retailer 12
-
$4,629 USD
View
Price last confirmed 19 days ago
B+
Retailer 13
-
$4,670 USD
View
Retailer 14
-
$4,697 USD
View
Price last confirmed 28 days ago
B+
Retailer 15
-
$4,701 USD
View
Retailer 16
-
$5,342 USD
View
Price last confirmed 18 days ago
B+
Retailer 17
-
$5,553 USD
View
B
Retailer 18
-
$7,230 USD
View
Most Expensive
NZ Jewellers
a8878e84-ef46-4992-b67a-8eceeb60932b · Oct 18
$8,065 USD
View
Price last confirmed 19 days ago
18 more retailers have this diamond
Prices start from $3,481 USDSave up to $3,749 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
1.51ct Heart
$3,481 USD