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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 $802 SGD
HK$4,900 HKD
As of November 1, 2026
Save $1,143 SGD (59%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $3,330 SGD 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: $3,330 SGD|Low: $802 SGD|High: $3,330 SGD|Avg: $1,315 SGD
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$802 SGD
Retailer 17$804 SGD
Retailer 6$947 SGD
Retailer 3$972 SGD
Retailer 8$981 SGD
Retailer 11$1,018 SGD
Retailer 12$1,062 SGD
Retailer 22$1,062 SGD
Retailer 9$1,076 SGD
Retailer 23$1,103 SGD
Retailer 15$1,122 SGD
Retailer 4$1,226 SGD
Retailer 21$1,232 SGD
Retailer 13$1,268 SGD
Retailer 5$1,272 SGD
Retailer 2$1,304 SGD
Retailer 14$1,422 SGD
Retailer 7$1,479 SGD
Retailer 19$1,499 SGD
Retailer 16$1,520 SGD
Retailer 20$1,639 SGD
Retailer 18$1,945 SGD
NZ Jewellers$3,330 SGD

23 data points across 23 retailers

25 retailers$802 SGD to $1,945 SGD

A
Cheapest Retailer
-
$802 SGD
HK$4,900 HKD
A
Retailer 2
-
$804 SGD
₹59,921 INR
View
A
Retailer 3
-
$947 SGD
$741 USD
View
Retailer 4
-
$972 SGD
$760 USD
View
Price last confirmed 11 days ago
A
Retailer 5
-
$981 SGD
$767 USD
View
Final sale: no returns
B+
Retailer 6
-
$999 SGD
A$1,202 AUD
View
A
Retailer 7
-
$1,018 SGD
View
B+
Retailer 8
-
$1,062 SGD
$831 USD
View
B+
Retailer 9
-
$1,062 SGD
$831 USD
View
B+
Retailer 10
-
$1,076 SGD
$842 USD
View
B+
Retailer 11
-
$1,103 SGD
$863 USD
View
B+
Retailer 12
-
$1,122 SGD
View
B+
Retailer 13
-
$1,226 SGD
$959 USD
View
B+
Retailer 14
-
$1,232 SGD
$964 USD
View
B+
Retailer 15
-
$1,268 SGD
£781 GBP
View
B
Retailer 16
-
$1,272 SGD
$995 USD
View
B+
Retailer 17
-
$1,304 SGD
£803 GBP
View
B+
Retailer 18
-
$1,422 SGD
$1,112 USD
View
B
Retailer 19
-
$1,479 SGD
$1,157 USD
View
B+
Retailer 20
-
$1,499 SGD
€1,117 EUR
View
B
Retailer 21
-
$1,520 SGD
$1,189 USD
View
B
Retailer 22
-
$1,639 SGD
ZAR 20,716 ZAR
View
Retailer 23
-
$1,656 SGD
A$1,993 AUD
View
Price last confirmed 29 days ago
B
Retailer 24
-
$1,945 SGD
£1,198 GBP
View
Most Expensive
NZ Jewellers
4602bb7f-0c81-4db7-90e5-a0a5de6a7b7c · Oct 30
$3,330 SGD
$2,605 USD
View
Price under review
24 more retailers have this diamond
Prices start from $802 SGDSave up to $1,143 SGD

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
$802 SGD