CaratHunter
Plans
Heart|Natural|GIA

0.51ct D SI2 Heart Natural Diamond

EX • D/SI2 • GIA 5536726746

Certificate GIA 5536726746

Diamond specifications and retailer prices

From $1,179 AUD
$828 USD
As of November 2, 2026
Save $1,405 AUD (54%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $4,423 AUD at NZ Jewellers · As of October 30, 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 D 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 5536726746. Listed at 11 retailers as of November 1, 2026, with a 119% 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
D
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Pavilion angle38.8°
OriginNatural
Grading LabGIA
CertificateGIA 5536726746
Dimensions4.76 × 5.51 × 3.29 mm
L/W Ratio1.16
Top View
4.76 mm5.51 mm0.51 ctD / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 5536726746
Side View
Table 57.0%CrownGirdle: STK-ETKPavilion 38.8°Culet: NoneDepth 59.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $4,423 AUD|Low: $1,036 AUD|High: $4,423 AUD|Avg: $1,827 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 5$1,179 AUD
Retailer 8$1,278 AUD
Retailer 9$1,278 AUD
Retailer 6$1,327 AUD
Retailer 7$1,327 AUD
Retailer 10$1,475 AUD
Retailer 2$1,669 AUD
Retailer 4$1,768 AUD
Retailer 3$2,584 AUD
NZ Jewellers$4,423 AUD

39 data points across 10 retailers

11 retailers$1,179 AUD to $2,584 AUD

B+
Cheapest Retailer
-
$1,179 AUD
$828 USD
Final sale: no returns
B+
Retailer 2
-
$1,228 AUD
$863 USD
View
B+
Retailer 3
-
$1,278 AUD
$898 USD
View
B+
Retailer 4
-
$1,305 AUD
$917 USD
View
B+
Retailer 5
-
$1,327 AUD
$932 USD
View
B+
Retailer 6
-
$1,327 AUD
$932 USD
View
B
Retailer 7
-
$1,475 AUD
$1,036 USD
View
B
Retailer 8
-
$1,669 AUD
£923 GBP
View
B
Retailer 9
-
$1,768 AUD
£978 GBP
View
B
Retailer 10
-
$2,584 AUD
£1,429 GBP
View
Most Expensive
NZ Jewellers
ae66c21a-9a3b-4208-9d3a-d74a0da28ed7 · Oct 30
$4,423 AUD
$3,107 USD
View
Price under review
10 more retailers have this diamond
Prices start from $1,179 AUDSave up to $1,405 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.

B+
0.51ct Heart
$1,179 AUD