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Heart|Natural|GIA

1.51ct I SI2 Heart Natural Diamond

VG • I/SI2 • GIA 2557140157

Certificate GIA 2557140157

Diamond specifications and retailer prices

From $4,561 AUD
As of November 6, 2026
Save $5,353 AUD (54%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $11,294 AUD 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2557140157. Listed at 14 retailers as of November 4, 2026, with a 117% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
I
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557140157
Dimensions6.99 × 7.88 × 4.63 mm
L/W Ratio1.13
Top View
6.99 mm7.88 mm1.51 ctI / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557140157
Side View
Table 59.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 58.7%

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: $4,983 AUD|Low: $4,561 AUD|High: $10,448 AUD|Avg: $6,514 AUD|+1.5%
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 11$4,561 AUD
Retailer 8$4,601 AUD
Retailer 1$4,983 AUD
Retailer 2$5,120 AUD
Retailer 3$5,318 AUD
Retailer 4$5,341 AUD
Retailer 5$5,418 AUD
Retailer 7$5,603 AUD
Retailer 10$6,037 AUD
Retailer 9$7,961 AUD
Retailer 6$9,456 AUD
Retailer 12$9,914 AUD

35 data points across 12 retailers

14 retailers$4,561 AUD to $9,914 AUD

A
Cheapest Retailer
-
$4,561 AUD
A
Retailer 2
-
$4,601 AUD
View
A
Retailer 3
-
$4,983 AUD
View
Final sale: no returns
A
Retailer 4
-
$5,120 AUD
View
A
Retailer 5
-
$5,318 AUD
View
A
Retailer 6
-
$5,341 AUD
View
A
Retailer 7
-
$5,418 AUD
View
A
Retailer 8
-
$5,603 AUD
View
A
Retailer 9
-
$6,037 AUD
View
B+
Retailer 10
-
$6,610 AUD
View
B+
Retailer 11
-
$7,961 AUD
View
B
Retailer 12
-
$9,456 AUD
View
B
Retailer 13
-
$9,914 AUD
View
Most Expensive
NZ Jewellers
d85614ba-f21d-4946-a9ce-9e008d9e8309 · Sep 25
$11,294 AUD
$7,760 USD
View
Price last confirmed 42 days ago
13 more retailers have this diamond
Prices start from $4,561 AUDSave up to $5,353 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
$4,561 AUD