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Heart|Natural|GIA

1.51ct I SI2 Heart Natural Diamond

EX • I/SI2 • GIA 2558582288

Certificate GIA 2558582288

Diamond specifications and retailer prices

From $4,360 AUD
As of November 6, 2026
Save $5,337 AUD (55%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $11,013 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2558582288. Listed at 13 retailers as of November 2, 2026, with a 122% 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 2558582288
Dimensions7.02 × 7.80 × 4.64 mm
L/W Ratio1.11
Girdle conditionFaceted
Top View
7.02 mm7.80 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2558582288
Side View
Table 58.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 59.4%

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: $5,873 AUD|Low: $4,304 AUD|High: $10,426 AUD|Avg: $6,173 AUD|+1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 11$4,360 AUD
Retailer 8$4,378 AUD
Retailer 5$4,681 AUD
Retailer 2$4,689 AUD
Retailer 10$4,848 AUD
Retailer 7$5,501 AUD
Retailer 1$5,873 AUD
Retailer 4$6,525 AUD
Retailer 9$7,801 AUD
Retailer 3$9,050 AUD
Retailer 6$9,697 AUD

35 data points across 11 retailers

13 retailers$4,360 AUD to $9,697 AUD

A
Cheapest Retailer
-
$4,360 AUD
A
Retailer 2
-
$4,378 AUD
View
A
Retailer 3
-
$4,681 AUD
View
A
Retailer 4
-
$4,689 AUD
View
A
Retailer 5
-
$4,848 AUD
View
Final sale: no returns
A
Retailer 6
-
$5,501 AUD
View
A
Retailer 7
-
$5,873 AUD
View
B+
Retailer 8
-
$6,289 AUD
View
B+
Retailer 9
-
$6,525 AUD
View
B+
Retailer 10
-
$7,801 AUD
View
B+
Retailer 11
-
$9,050 AUD
View
B
Retailer 12
-
$9,697 AUD
View
Most Expensive
NZ Jewellers
79b6de24-c94c-44b2-a0a4-19c056c56763 · Sep 25
$11,013 AUD
$7,567 USD
View
Price last confirmed 42 days ago
12 more retailers have this diamond
Prices start from $4,360 AUDSave up to $5,337 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
$4,360 AUD