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Heart|Natural|GIA

1.51ct J SI2 Heart Natural Diamond

EX • J/SI2 • GIA 7456939844

Certificate GIA 7456939844

Diamond specifications and retailer prices

From $3,731 AUD
$2,621 USD
As of November 1, 2026
Save $4,782 AUD (56%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $8,856 AUD at NZ Jewellers · As of October 24, 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7456939844. Listed at 13 retailers as of October 26, 2026, with a 128% 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.5°
Pavilion angle37.97°
OriginNatural
Grading LabGIA
CertificateGIA 7456939844
Dimensions6.64 × 7.87 × 4.77 mm
L/W Ratio1.19
Top View
6.64 mm7.87 mm1.51 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7456939844
Side View
Table 62.0%Crown 46.5°Girdle: THN-THKPavilion 37.97°Culet: NoneDepth 60.6%

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 1
Current: $8,856 AUD|Low: $3,731 AUD|High: $8,856 AUD|Avg: $5,435 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
October 27, 2026
Retailer 17$3,731 AUD
Retailer 18$3,992 AUD
Retailer 19$4,111 AUD
Retailer 10$4,406 AUD
Retailer 14$4,605 AUD
Retailer 15$4,783 AUD
Retailer 11$4,935 AUD
Retailer 16$4,994 AUD
Retailer 12$5,091 AUD
Retailer 8$5,139 AUD
Retailer 4$5,282 AUD
Retailer 5$5,282 AUD
Retailer 2$5,366 AUD
Retailer 7$5,445 AUD
Retailer 3$5,452 AUD
Retailer 6$5,767 AUD
Retailer 9$7,059 AUD
Retailer 13$8,514 AUD
NZ Jewellers$8,856 AUD

19 data points across 19 retailers

13 retailers$3,731 AUD to $8,514 AUD

A
Cheapest Retailer
-
$3,731 AUD
$2,621 USD
A
Retailer 2
-
$3,992 AUD
$2,804 USD
View
A
Retailer 3
-
$4,111 AUD
$2,888 USD
View
A
Retailer 4
-
$4,605 AUD
$3,235 USD
View
Price last confirmed 7 days ago
Retailer 5
-
$4,783 AUD
$3,360 USD
View
Price last confirmed 7 days ago
B+
Retailer 6
-
$4,994 AUD
$3,508 USD
View
B+
Retailer 7
-
$5,091 AUD
£2,816 GBP
View
B+
Retailer 8
-
$5,282 AUD
$3,710 USD
View
B+
Retailer 9
-
$5,282 AUD
$3,710 USD
View
B+
Retailer 10
-
$5,366 AUD
$3,769 USD
View
B+
Retailer 11
-
$5,452 AUD
$3,830 USD
View
B
Retailer 12
-
$8,514 AUD
£4,709 GBP
View
Most Expensive
NZ Jewellers
5ff0a33f-bce3-4bc9-b74d-835c40274907 · Oct 24
$8,856 AUD
$6,221 USD
View
Price last confirmed 9 days ago
12 more retailers have this diamond
Prices start from $3,731 AUDSave up to $4,782 AUD

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
$3,731 AUD