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Heart|Natural|GIA

0.51ct H SI1 Heart Natural Diamond

EX • H/SI1 • GIA 3545408166

Certificate GIA 3545408166

Diamond specifications and retailer prices

From $576 AUD
As of November 6, 2026
Save $1,115 AUD (66%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,336 AUD at NZ Jewellers · As of September 25, 2026
View at NZ Jewellers

About this 0.51ct natural heart diamond

This 0.51ct natural heart sits in the half to three-quarter carat band, graded H 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 3545408166. Listed at 13 retailers as of November 6, 2026, with a 193% 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

0.51
Carat
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
Pavilion angle42°
OriginNatural
Grading LabGIA
CertificateGIA 3545408166
Dimensions4.87 × 5.71 × 3.35 mm
L/W Ratio1.17
Top View
4.87 mm5.71 mm0.51 ctH / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 3545408166
Side View
Table 59.0%CrownGirdle: MED-VTKPavilion 42°Culet: NoneDepth 58.7%

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: $787 AUD|Low: $493 AUD|High: $1,811 AUD|Avg: $935 AUD|-11.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 7, 2026
Retailer 12$576 AUD
Retailer 2$669 AUD
Retailer 3$678 AUD
Retailer 8$702 AUD
Retailer 7$723 AUD
Retailer 6$739 AUD
Retailer 1$787 AUD
Retailer 10$1,025 AUD
Retailer 11$1,026 AUD
Retailer 9$1,141 AUD
Retailer 4$1,156 AUD
Retailer 5$1,691 AUD

35 data points across 12 retailers

13 retailers$576 AUD to $1,691 AUD

A
Cheapest Retailer
-
$576 AUD
A
Retailer 2
-
$669 AUD
View
B+
Retailer 3
-
$678 AUD
View
Final sale: no returns
A
Retailer 4
-
$702 AUD
View
A
Retailer 5
-
$723 AUD
View
B+
Retailer 6
-
$739 AUD
View
B+
Retailer 7
-
$787 AUD
View
B+
Retailer 8
-
$1,025 AUD
View
B+
Retailer 9
-
$1,026 AUD
View
B
Retailer 10
-
$1,141 AUD
View
Retailer 11
-
$1,156 AUD
View
Price last confirmed 34 days ago
B
Retailer 12
-
$1,691 AUD
View
Most Expensive
NZ Jewellers
90cec75c-5fc3-44e1-aea5-17ebe829a068 · Sep 25
$2,336 AUD
$1,605 USD
View
Price under review
12 more retailers have this diamond
Prices start from $576 AUDSave up to $1,115 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
0.51ct Heart
$576 AUD