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Oval|Natural|GIA

0.51ct D SI1 Oval Natural Diamond

EX • D/SI1 • GIA 5566129731

Certificate GIA 5566129731

Diamond specifications and retailer prices

From $893 AUD
HK$4,900 HKD
As of November 1, 2026
Save $1,273 AUD (59%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $3,708 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.51ct natural oval diamond

This 0.51ct natural oval sits in the half to three-quarter carat band, graded D 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 5566129731. Listed at 25 retailers as of November 1, 2026, with a 143% 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle34.5°
Pavilion angle38.6°
OriginNatural
Grading LabGIA
CertificateGIA 5566129731
Dimensions6.44 × 4.59 × 2.78 mm
L/W Ratio1.40
Culet sizeNone
Key to symbols
Crystal
Top View
6.44 mm4.59 mm0.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 5566129731
Side View
Table 64.0%Crown 34.5°Girdle: MED-THKPavilion 38.6°Culet: NoneDepth 60.5%

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 1
Current: $3,708 AUD|Low: $893 AUD|High: $3,708 AUD|Avg: $1,465 AUD
NZ Jewellers
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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
Retailer 23
November 2, 2026
Retailer 10$893 AUD
Retailer 17$896 AUD
Retailer 6$1,055 AUD
Retailer 3$1,082 AUD
Retailer 8$1,092 AUD
Retailer 11$1,134 AUD
Retailer 12$1,183 AUD
Retailer 22$1,183 AUD
Retailer 9$1,199 AUD
Retailer 23$1,229 AUD
Retailer 15$1,249 AUD
Retailer 4$1,365 AUD
Retailer 21$1,372 AUD
Retailer 13$1,412 AUD
Retailer 5$1,416 AUD
Retailer 2$1,452 AUD
Retailer 14$1,583 AUD
Retailer 7$1,647 AUD
Retailer 19$1,670 AUD
Retailer 16$1,693 AUD
Retailer 20$1,826 AUD
Retailer 18$2,166 AUD
NZ Jewellers$3,708 AUD

23 data points across 23 retailers

25 retailers$893 AUD to $2,166 AUD

A
Cheapest Retailer
-
$893 AUD
HK$4,900 HKD
A
Retailer 2
-
$896 AUD
₹59,921 INR
View
A
Retailer 3
-
$1,055 AUD
$741 USD
View
Retailer 4
-
$1,082 AUD
$760 USD
View
Price last confirmed 11 days ago
A
Retailer 5
-
$1,092 AUD
$767 USD
View
Final sale: no returns
B+
Retailer 6
-
$1,112 AUD
View
A
Retailer 7
-
$1,134 AUD
SGD 1,076 SGD
View
B+
Retailer 8
-
$1,183 AUD
$831 USD
View
B+
Retailer 9
-
$1,183 AUD
$831 USD
View
B+
Retailer 10
-
$1,199 AUD
$842 USD
View
B+
Retailer 11
-
$1,229 AUD
$863 USD
View
B+
Retailer 12
-
$1,249 AUD
SGD 1,186 SGD
View
B+
Retailer 13
-
$1,365 AUD
$959 USD
View
B+
Retailer 14
-
$1,372 AUD
$964 USD
View
B+
Retailer 15
-
$1,412 AUD
£781 GBP
View
B
Retailer 16
-
$1,416 AUD
$995 USD
View
B+
Retailer 17
-
$1,452 AUD
£803 GBP
View
B+
Retailer 18
-
$1,583 AUD
$1,112 USD
View
B
Retailer 19
-
$1,647 AUD
$1,157 USD
View
B+
Retailer 20
-
$1,670 AUD
€1,117 EUR
View
B
Retailer 21
-
$1,693 AUD
$1,189 USD
View
B
Retailer 22
-
$1,826 AUD
ZAR 20,716 ZAR
View
Retailer 23
-
$1,844 AUD
View
Price last confirmed 29 days ago
B
Retailer 24
-
$2,166 AUD
£1,198 GBP
View
Most Expensive
NZ Jewellers
4602bb7f-0c81-4db7-90e5-a0a5de6a7b7c · Oct 30
$3,708 AUD
$2,605 USD
View
Price under review
24 more retailers have this diamond
Prices start from $893 AUDSave up to $1,273 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 Oval
$893 AUD