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Heart|Natural|GIA

1.51ct I SI2 Heart Natural Diamond

EX • I/SI2 • GIA 2556424615

Certificate GIA 2556424615

Diamond specifications and retailer prices

From $4,819 AUD
As of November 5, 2026
Save $5,734 AUD (54%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $11,575 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 I 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 2556424615. Listed at 15 retailers as of November 4, 2026, with a 119% 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556424615
Dimensions7.08 × 7.99 × 4.41 mm
L/W Ratio1.13
Girdle conditionFaceted
Top View
7.08 mm7.99 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556424615
Side View
Table 57.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 55.1%

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 5
Current: $11,575 AUD|Low: $4,819 AUD|High: $11,856 AUD|Avg: $7,088 AUD|-2.4%
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
November 6, 2026
Retailer 14$4,819 AUD
Retailer 10$4,861 AUD
Retailer 4$5,264 AUD
Retailer 2$5,421 AUD
Retailer 5$5,510 AUD
Retailer 6$5,516 AUD
Retailer 7$5,708 AUD
Retailer 9$6,025 AUD
Retailer 13$6,127 AUD
Retailer 12$6,289 AUD
Retailer 11$8,645 AUD
Retailer 8$9,978 AUD
Retailer 3$10,553 AUD
NZ Jewellers$11,575 AUD

26 data points across 14 retailers

15 retailers$4,819 AUD to $10,553 AUD

A
Cheapest Retailer
-
$4,819 AUD
A
Retailer 2
-
$4,861 AUD
View
A
Retailer 3
-
$5,264 AUD
View
A
Retailer 4
-
$5,421 AUD
View
Final sale: no returns
A
Retailer 5
-
$5,510 AUD
View
A
Retailer 6
-
$5,516 AUD
View
A
Retailer 7
-
$5,708 AUD
View
A
Retailer 8
-
$6,025 AUD
View
A
Retailer 9
-
$6,127 AUD
View
A
Retailer 10
-
$6,289 AUD
View
B+
Retailer 11
-
$6,819 AUD
View
B
Retailer 12
-
$8,645 AUD
View
B
Retailer 13
-
$9,978 AUD
View
B
Retailer 14
-
$10,553 AUD
View
Most Expensive
NZ Jewellers
f9d93be4-a7b3-4f11-9949-bab1c55ecbc4 · Oct 24
$11,575 AUD
$7,953 USD
View
Price last confirmed 13 days ago
14 more retailers have this diamond
Prices start from $4,819 AUDSave up to $5,734 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
$4,819 AUD