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Heart|Natural|GIA

1.51ct I SI2 Heart Natural Diamond

EX • I/SI2 • GIA 6395991628

Certificate GIA 6395991628

Diamond specifications and retailer prices

From $6,335 AUD
As of November 6, 2026
Save $7,600 AUD (55%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $13,935 AUD at NZ Jewellers · As of November 5, 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 6395991628. Listed at 17 retailers as of November 5, 2026, with prices from $6,335 to $13,935, a $7,600 spread on the same certified stone. NZ Jewellers lists it at $13,935. 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 6395991628
Dimensions7.21 × 7.86 × 4.42 mm
L/W Ratio1.09
Top View
7.21 mm7.86 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6395991628
Side View
Table 60.0%CrownGirdle: THN-VTKPavilionCulet: NoneDepth 56.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $7,888 AUD|Low: $6,300 AUD|High: $13,106 AUD|Avg: $8,506 AUD|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 3$6,335 AUD
Retailer 6$6,477 AUD
Retailer 1$7,888 AUD
Retailer 5$8,332 AUD
Retailer 2$9,376 AUD
Retailer 4$12,915 AUD

43 data points across 6 retailers

17 retailers$6,335 AUD to $13,935 AUD

A
Cheapest Retailer
-
$6,335 AUD
B+
Retailer 2
-
$6,477 AUD
View
B+
Retailer 3
-
$6,869 AUD
View
B+
Retailer 4
-
$6,869 AUD
View
B+
Retailer 5
-
$7,050 AUD
View
B+
Retailer 6
-
$7,102 AUD
View
B+
Retailer 7
-
$7,267 AUD
View
B+
Retailer 8
-
$7,888 AUD
View
B
Retailer 9
-
$8,227 AUD
View
Retailer 10
-
$8,332 AUD
View
Price last confirmed 9 days ago
B
Retailer 11
-
$8,332 AUD
View
B
Retailer 12
-
$8,332 AUD
View
B
Retailer 13
-
$8,556 AUD
View
B+
Retailer 14
-
$9,376 AUD
View
B
Retailer 15
-
$9,613 AUD
View
B
Retailer 16
-
$12,915 AUD
View
Most Expensive
B
NZ Jewellers
1fc45747-6b72-4cb9-9f11-25bbf6aa3c05 · Nov 5
$13,935 AUD
$9,575 USD
View
16 more retailers have this diamond
Prices start from $6,335 AUDSave up to $7,600 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
$6,335 AUD