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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 HK$4,921 HKD
As of November 1, 2026
Save HK$7,016 HKD (59%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: HK$20,438 HKD 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: HK$20,438 HKD|Low: HK$4,921 HKD|High: HK$20,438 HKD|Avg: HK$8,072 HKD
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 10HK$4,921 HKD
Retailer 17HK$4,936 HKD
Retailer 6HK$5,814 HKD
Retailer 3HK$5,963 HKD
Retailer 8HK$6,018 HKD
Retailer 11HK$6,247 HKD
Retailer 12HK$6,520 HKD
Retailer 22HK$6,520 HKD
Retailer 9HK$6,606 HKD
Retailer 23HK$6,771 HKD
Retailer 15HK$6,886 HKD
Retailer 4HK$7,524 HKD
Retailer 21HK$7,560 HKD
Retailer 13HK$7,783 HKD
Retailer 5HK$7,806 HKD
Retailer 2HK$8,001 HKD
Retailer 14HK$8,725 HKD
Retailer 7HK$9,077 HKD
Retailer 19HK$9,202 HKD
Retailer 16HK$9,331 HKD
Retailer 20HK$10,061 HKD
Retailer 18HK$11,937 HKD
NZ JewellersHK$20,438 HKD

23 data points across 23 retailers

25 retailersHK$4,921 HKD to HK$11,937 HKD

A
Cheapest Retailer
-
HK$4,921 HKD
A
Retailer 2
-
HK$4,936 HKD
₹59,921 INR
View
A
Retailer 3
-
HK$5,814 HKD
$741 USD
View
Retailer 4
-
HK$5,963 HKD
$760 USD
View
Price last confirmed 11 days ago
A
Retailer 5
-
HK$6,018 HKD
$767 USD
View
Final sale: no returns
B+
Retailer 6
-
HK$6,129 HKD
A$1,202 AUD
View
A
Retailer 7
-
HK$6,247 HKD
SGD 1,076 SGD
View
B+
Retailer 8
-
HK$6,520 HKD
$831 USD
View
B+
Retailer 9
-
HK$6,520 HKD
$831 USD
View
B+
Retailer 10
-
HK$6,606 HKD
$842 USD
View
B+
Retailer 11
-
HK$6,771 HKD
$863 USD
View
B+
Retailer 12
-
HK$6,886 HKD
SGD 1,186 SGD
View
B+
Retailer 13
-
HK$7,524 HKD
$959 USD
View
B+
Retailer 14
-
HK$7,560 HKD
$964 USD
View
B+
Retailer 15
-
HK$7,783 HKD
£781 GBP
View
B
Retailer 16
-
HK$7,806 HKD
$995 USD
View
B+
Retailer 17
-
HK$8,001 HKD
£803 GBP
View
B+
Retailer 18
-
HK$8,725 HKD
$1,112 USD
View
B
Retailer 19
-
HK$9,077 HKD
$1,157 USD
View
B+
Retailer 20
-
HK$9,202 HKD
€1,117 EUR
View
B
Retailer 21
-
HK$9,331 HKD
$1,189 USD
View
B
Retailer 22
-
HK$10,061 HKD
ZAR 20,716 ZAR
View
Retailer 23
-
HK$10,164 HKD
A$1,993 AUD
View
Price last confirmed 29 days ago
B
Retailer 24
-
HK$11,937 HKD
£1,198 GBP
View
Most Expensive
NZ Jewellers
4602bb7f-0c81-4db7-90e5-a0a5de6a7b7c · Oct 30
HK$20,438 HKD
$2,605 USD
View
Price under review
24 more retailers have this diamond
Prices start from HK$4,921 HKDSave up to HK$7,016 HKD

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
HK$4,921 HKD