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Heart|Natural|GIA

1.51ct I SI2 Heart Natural Diamond

EX • I/SI2 • GIA 1543577711

Certificate GIA 1543577711

Diamond specifications and retailer prices

From $4,378 AUD
As of November 6, 2026
Save $5,225 AUD (54%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $11,205 AUD at NZ Jewellers · As of September 30, 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 1543577711. Listed at 17 retailers as of November 2, 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
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1543577711
Dimensions7.23 × 7.94 × 4.63 mm
L/W Ratio1.10
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Cloud, Feather, Crystal, Cavity, Needle
Top View
7.23 mm7.94 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1543577711
Side View
Table 63.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 58.3%

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: $4,624 AUD|Low: $4,378 AUD|High: $10,339 AUD|Avg: $6,020 AUD|-12.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 9$4,378 AUD
Retailer 1$4,624 AUD
Retailer 2$5,301 AUD
Retailer 4$5,520 AUD
Retailer 6$5,724 AUD
Retailer 5$5,817 AUD
Retailer 10$5,955 AUD
Retailer 8$5,996 AUD
Retailer 3$6,462 AUD
Retailer 7$9,603 AUD

37 data points across 10 retailers

17 retailers$4,378 AUD to $9,603 AUD

A
Cheapest Retailer
-
$4,378 AUD
A
Retailer 2
-
$4,624 AUD
View
A
Retailer 3
-
$5,301 AUD
View
Final sale: no returns
A
Retailer 4
-
$5,520 AUD
View
A
Retailer 5
-
$5,724 AUD
View
A
Retailer 6
-
$5,817 AUD
View
B+
Retailer 7
-
$5,919 AUD
View
B+
Retailer 8
-
$5,955 AUD
View
B+
Retailer 9
-
$5,996 AUD
View
B+
Retailer 10
-
$6,289 AUD
View
Retailer 11
-
$6,431 AUD
View
Price last confirmed 30 days ago
Retailer 12
-
$6,431 AUD
View
Price last confirmed 37 days ago
Retailer 13
-
$6,431 AUD
View
Price last confirmed 30 days ago
B+
Retailer 14
-
$6,462 AUD
View
Retailer 15
-
$7,421 AUD
View
Price last confirmed 39 days ago
B
Retailer 16
-
$9,603 AUD
View
Most Expensive
NZ Jewellers
ee8781a8-47d7-4023-85f6-2e41dd61f5b5 · Sep 30
$11,205 AUD
$7,699 USD
View
Price last confirmed 37 days ago
16 more retailers have this diamond
Prices start from $4,378 AUDSave up to $5,225 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
$4,378 AUD