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Heart|Natural|GIA

1.51ct I SI2 Heart Natural Diamond

EX • I/SI2 • GIA 5546346351

Certificate GIA 5546346351

Diamond specifications and retailer prices

From $3,521 AUD
As of November 6, 2026
Save $4,207 AUD (54%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $7,728 AUD at MOH London · As of November 4, 2026
View at MOH London

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 5546346351. Listed at 14 retailers as of November 4, 2026, with prices from $3,521 to $7,728, a $4,207 spread on the same certified stone. MOH London lists it at $7,728. 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
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5546346351
Dimensions7.01 × 7.97 × 4.70 mm
L/W Ratio1.14
Top View
7.01 mm7.97 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 5546346351
Side View
Table 63.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 58.9%

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: $7,728 AUD|Low: $3,502 AUD|High: $8,942 AUD|Avg: $5,024 AUD|-12.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 5$3,521 AUD
Retailer 4$3,790 AUD
Retailer 2$4,059 AUD
Retailer 3$4,794 AUD
Retailer 6$4,842 AUD
Retailer 8$4,908 AUD
Retailer 9$4,943 AUD
Retailer 7$4,977 AUD
MOH London$7,728 AUD

44 data points across 9 retailers

14 retailers$3,521 AUD to $7,728 AUD

A
Cheapest Retailer
-
$3,521 AUD
A
Retailer 2
-
$3,790 AUD
View
A
Retailer 3
-
$4,059 AUD
View
A
Retailer 4
-
$4,794 AUD
View
A
Retailer 5
-
$4,842 AUD
View
Retailer 6
-
$4,908 AUD
View
Price last confirmed 11 days ago
A
Retailer 7
-
$4,943 AUD
View
A
Retailer 8
-
$4,977 AUD
View
A
Retailer 9
-
$5,219 AUD
View
Retailer 10
-
$5,285 AUD
View
Price last confirmed 30 days ago
Retailer 11
-
$5,285 AUD
View
Price last confirmed 30 days ago
Retailer 12
-
$5,487 AUD
View
Price last confirmed 37 days ago
Retailer 13
-
$6,097 AUD
View
Price last confirmed 39 days ago
Most Expensive
B+
MOH London
0FB90FE62 · Nov 4
$7,728 AUD
£4,181 GBP
View
13 more retailers have this diamond
Prices start from $3,521 AUDSave up to $4,207 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
$3,521 AUD