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Oval|Natural|GIA

0.51ct D SI1 Oval Natural Diamond

EX • D/SI1 • GIA 2518352958

Certificate GIA 2518352958

Diamond specifications and retailer prices

From HK$7,069 HKD
$901 USD
As of October 31, 2026
Save HK$8,425 HKD (54%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: HK$20,626 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 2518352958. Listed at 16 retailers as of October 31, 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle39.02°
Pavilion angle39.28°
OriginNatural
Grading LabGIA
CertificateGIA 2518352958
Dimensions6.56 × 4.41 × 2.72 mm
L/W Ratio1.49
Top View
6.56 mm4.41 mm0.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2518352958
Side View
Table 58.0%Crown 39.02°Girdle: STK-THKPavilion 39.28°Culet: NoneDepth 61.8%

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: Oct 31
Current: HK$20,626 HKD|Low: HK$5,892 HKD|High: HK$20,626 HKD|Avg: HK$10,626 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
November 1, 2026
Retailer 10HK$7,069 HKD
Retailer 9HK$7,500 HKD
Retailer 13HK$7,595 HKD
Retailer 3HK$7,665 HKD
Retailer 5HK$7,665 HKD
Retailer 12HK$7,956 HKD
Retailer 4HK$8,842 HKD
Retailer 6HK$9,979 HKD
Retailer 11HK$11,059 HKD
Retailer 7HK$11,863 HKD
Retailer 8HK$13,055 HKD
Retailer 2HK$15,494 HKD
NZ JewellersHK$20,626 HKD

45 data points across 13 retailers

16 retailersHK$7,069 HKD to HK$15,494 HKD

B+
Cheapest Retailer
-
HK$7,069 HKD
$901 USD
Final sale: no returns
B+
Retailer 2
-
HK$7,500 HKD
$956 USD
View
B+
Retailer 3
-
HK$7,524 HKD
$959 USD
View
B+
Retailer 4
-
HK$7,532 HKD
$960 USD
View
B+
Retailer 5
-
HK$7,595 HKD
$968 USD
View
B+
Retailer 6
-
HK$7,665 HKD
$977 USD
View
B+
Retailer 7
-
HK$7,665 HKD
$977 USD
View
B+
Retailer 8
-
HK$7,956 HKD
$1,014 USD
View
B+
Retailer 9
-
HK$8,842 HKD
$1,127 USD
View
B
Retailer 10
-
HK$9,979 HKD
£1,001 GBP
View
Retailer 11
-
HK$11,059 HKD
A$2,168 AUD
View
Price last confirmed 28 days ago
B
Retailer 12
-
HK$11,863 HKD
€1,440 EUR
View
B
Retailer 13
-
HK$13,055 HKD
ZAR 26,882 ZAR
View
B
Retailer 14
-
HK$13,713 HKD
CA$2,428 CAD
View
B
Retailer 15
-
HK$15,494 HKD
£1,555 GBP
View
Most Expensive
NZ Jewellers
07e8e85c-3b95-4719-b79a-7ebc14a03306 · Oct 30
HK$20,626 HKD
$2,629 USD
View
Price under review
15 more retailers have this diamond
Prices start from HK$7,069 HKDSave up to HK$8,425 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.

B+
0.51ct Oval
HK$7,069 HKD