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Heart|Natural|GIA

1.51ct G SI1 Heart Natural Diamond

EX • G/SI1 • GIA 7548658345

Certificate GIA 7548658345

Diamond specifications and retailer prices

From $6,466 AUD
HK$35,400 HKD
As of November 2, 2026
Save $6,015 AUD (48%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $15,916 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7548658345. Listed at 18 retailers as of November 2, 2026, with a 93% 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Pavilion angle40.1°
OriginNatural
Grading LabGIA
CertificateGIA 7548658345
Dimensions6.85 × 7.92 × 4.61 mm
L/W Ratio1.16
Girdle conditionFaceted
Top View
6.85 mm7.92 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 7548658345
Side View
Table 59.0%CrownGirdle: STK-VTKPavilion 40.1°Culet: NoneDepth 58.2%

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 2
Current: $7,280 AUD|Low: $6,374 AUD|High: $14,371 AUD|Avg: $8,496 AUD|-6.0%
Retailer 1
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
Retailer 15
Retailer 16
November 2, 2026
Retailer 12$6,466 AUD
Retailer 7$6,497 AUD
Retailer 15$6,806 AUD
Retailer 13$7,083 AUD
Retailer 6$7,277 AUD
Retailer 1$7,280 AUD
Retailer 4$7,323 AUD
Retailer 3$7,408 AUD
Retailer 10$7,634 AUD
Retailer 11$8,122 AUD
Retailer 14$8,263 AUD
Retailer 16$8,574 AUD
Retailer 8$9,027 AUD
Retailer 2$10,271 AUD
Retailer 9$12,480 AUD
Retailer 5$13,577 AUD

26 data points across 16 retailers

18 retailers$6,466 AUD to $12,480 AUD

A
Cheapest Retailer
-
$6,466 AUD
HK$35,400 HKD
A
Retailer 2
-
$6,497 AUD
$4,553 USD
View
A
Retailer 3
-
$6,806 AUD
$4,770 USD
View
A
Retailer 4
-
$7,083 AUD
$4,964 USD
View
Final sale: no returns
A
Retailer 5
-
$7,277 AUD
$5,100 USD
View
A
Retailer 6
-
$7,280 AUD
€4,859 EUR
View
A
Retailer 7
-
$7,323 AUD
$5,132 USD
View
A
Retailer 8
-
$7,408 AUD
$5,192 USD
View
A
Retailer 9
-
$7,634 AUD
$5,350 USD
View
B+
Retailer 10
-
$8,122 AUD
$5,692 USD
View
B+
Retailer 11
-
$8,263 AUD
£4,560 GBP
View
B+
Retailer 12
-
$8,574 AUD
$6,009 USD
View
Retailer 13
-
$9,027 AUD
View
Price last confirmed 23 days ago
B+
Retailer 14
-
$9,338 AUD
View
B+
Retailer 15
-
$10,271 AUD
ZAR 116,289 ZAR
View
B
Retailer 16
-
$12,480 AUD
£6,887 GBP
View
Retailer 17
-
$13,577 AUD
$9,515 USD
View
Price last confirmed 10 days ago
Most Expensive
NZ Jewellers
dfd524f4-d138-4721-ad10-4a247a2a057c · Sep 25
$15,916 AUD
$11,154 USD
View
Price last confirmed 38 days ago
17 more retailers have this diamond
Prices start from $6,466 AUDSave up to $6,015 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
$6,466 AUD