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Heart|Natural|GIA

0.51ct E SI1 Heart Natural Diamond

ID • E/SI1 • GIA 5536992227

Certificate GIA 5536992227

Diamond specifications and retailer prices

From $639 AUD
As of November 6, 2026
Save $368 AUD (37%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $2,345 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5536992227. Listed at 14 retailers as of November 6, 2026, with a 58% 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
E
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Pavilion angle42.9°
OriginNatural
Grading LabGIA
CertificateGIA 5536992227
Dimensions4.62 × 5.49 × 3.50 mm
L/W Ratio1.19
Top View
4.62 mm5.49 mm0.51 ctE / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5536992227
Side View
Table 59.0%CrownGirdle: MED-THKPavilion 42.9°Culet: NoneDepth 63.8%

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: $815 AUD|Low: $470 AUD|High: $1,617 AUD|Avg: $888 AUD|+2.4%
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
November 6, 2026
Retailer 15$639 AUD
Retailer 13$640 AUD
Retailer 2$669 AUD
Retailer 10$688 AUD
Retailer 12$734 AUD
Retailer 14$739 AUD
Retailer 8$763 AUD
Retailer 1$815 AUD
Retailer 7$830 AUD
Retailer 9$872 AUD
Retailer 5$990 AUD
Retailer 11$1,007 AUD
Retailer 4$1,073 AUD
Retailer 6$1,076 AUD
Retailer 3$1,617 AUD

39 data points across 15 retailers

14 retailers$639 AUD to $1,007 AUD

A
Cheapest Retailer
-
$639 AUD
Final sale: no returns
A
Retailer 2
-
$640 AUD
View
A
Retailer 3
-
$669 AUD
View
A
Retailer 4
-
$688 AUD
View
A
Retailer 5
-
$734 AUD
View
Retailer 6
-
$739 AUD
View
Price last confirmed 19 days ago
A
Retailer 7
-
$763 AUD
View
A
Retailer 8
-
$815 AUD
View
A
Retailer 9
-
$872 AUD
View
B+
Retailer 10
-
$1,007 AUD
View
Retailer 11
-
$1,073 AUD
View
Price last confirmed 30 days ago
Retailer 12
-
$1,076 AUD
View
Price last confirmed 34 days ago
Retailer 13
-
$1,617 AUD
View
Price last confirmed 29 days ago
Most Expensive
NZ Jewellers
0e3a3b94-9eb8-4298-8d6f-681678d05d41 · Sep 25
$2,345 AUD
$1,611 USD
View
Price last confirmed 42 days ago
13 more retailers have this diamond
Prices start from $639 AUDSave up to $368 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
$639 AUD