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Heart|Natural|GIA

1.51ct J SI1 Heart Natural Diamond

EX • J/SI1 • GIA 1242032984

Certificate GIA 1242032984

Diamond specifications and retailer prices

From $5,172 NZD
As of November 6, 2026
Save $6,514 NZD (56%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $13,217 NZD at NZ Jewellers · As of September 25, 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 J 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 1242032984. Listed at 14 retailers as of November 2, 2026, with a 126% 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1242032984
Dimensions7.79 × 6.57 × 4.88 mm
L/W Ratio1.19
Girdle conditionFaceted
Top View
7.79 mm6.57 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1242032984
Side View
Table 59.0%CrownGirdle: STK-VTKPavilionCulet: NDepth 62.6%

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 6
Current: $6,528 NZD|Low: $5,101 NZD|High: $12,840 NZD|Avg: $7,779 NZD|-4.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 10$5,172 NZD
Retailer 6$5,866 NZD
Retailer 8$6,308 NZD
Retailer 2$6,314 NZD
Retailer 11$6,449 NZD
Retailer 1$6,528 NZD
Retailer 5$6,602 NZD
Retailer 12$7,703 NZD
Retailer 4$8,027 NZD
Retailer 7$8,529 NZD
Retailer 3$10,858 NZD
Retailer 9$11,686 NZD

37 data points across 12 retailers

14 retailers$5,172 NZD to $11,686 NZD

A
Cheapest Retailer
-
$5,172 NZD
A
Retailer 2
-
$5,866 NZD
View
B+
Retailer 3
-
$6,308 NZD
View
A
Retailer 4
-
$6,314 NZD
View
B+
Retailer 5
-
$6,449 NZD
View
Final sale: no returns
B+
Retailer 6
-
$6,528 NZD
View
B+
Retailer 7
-
$6,602 NZD
View
B+
Retailer 8
-
$7,571 NZD
View
B+
Retailer 9
-
$7,703 NZD
View
Retailer 10
-
$8,027 NZD
View
Price last confirmed 34 days ago
B
Retailer 11
-
$8,529 NZD
View
B
Retailer 12
-
$10,858 NZD
View
B
Retailer 13
-
$11,686 NZD
View
Most Expensive
NZ Jewellers
dcac04e0-fe8a-49e0-9bfa-ded47dca4470 · Sep 25
$13,217 NZD
$7,327 USD
View
Price last confirmed 42 days ago
13 more retailers have this diamond
Prices start from $5,172 NZDSave up to $6,514 NZD

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
$5,172 NZD