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Heart|Natural|GIA

1.51ct F SI2 Heart Natural Diamond

EX • F/SI2 • GIA 1555651065

Certificate GIA 1555651065

Diamond specifications and retailer prices

From $6,845 AUD
As of November 6, 2026
Save $4,934 AUD (42%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $12,401 AUD at NZ Jewellers · As of September 29, 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 F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1555651065. Listed at 12 retailers as of November 4, 2026, with a 72% 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
F
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1555651065
Dimensions7.99 × 6.79 × 4.70 mm
L/W Ratio1.18
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Crystal, Feather, Needle, Natural
Top View
7.99 mm6.79 mm1.51 ctF / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1555651065
Side View
Table 57.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 58.8%

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: $6,948 AUD|Low: $6,845 AUD|High: $11,953 AUD|Avg: $8,213 AUD|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 6$6,845 AUD
Retailer 1$6,948 AUD
Retailer 3$7,302 AUD
Retailer 5$7,415 AUD
Retailer 2$8,344 AUD
Retailer 4$11,779 AUD

40 data points across 6 retailers

12 retailers$6,845 AUD to $11,779 AUD

A
Cheapest Retailer
-
$6,845 AUD
Final sale: no returns
A
Retailer 2
-
$6,948 AUD
View
A
Retailer 3
-
$7,302 AUD
View
Retailer 4
-
$7,415 AUD
View
Price last confirmed 30 days ago
Retailer 5
-
$7,415 AUD
View
Price last confirmed 30 days ago
Retailer 6
-
$7,415 AUD
View
Price last confirmed 37 days ago
Retailer 7
-
$7,415 AUD
View
Price last confirmed 13 days ago
Retailer 8
-
$7,845 AUD
View
Price last confirmed 12 days ago
B+
Retailer 9
-
$8,344 AUD
View
Retailer 10
-
$8,556 AUD
View
Price last confirmed 39 days ago
B
Retailer 11
-
$11,779 AUD
View
Most Expensive
NZ Jewellers
340f49aa-9876-4491-8142-514b4e5a0261 · Sep 29
$12,401 AUD
$8,521 USD
View
Price last confirmed 38 days ago
11 more retailers have this diamond
Prices start from $6,845 AUDSave up to $4,934 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
$6,845 AUD