Oval|Natural|GIA

0.51ct D SI1 Oval Natural Diamond

EX • D/SI1 • GIA 5566129731

Certificate GIA 5566129731

Diamond specifications and retailer prices

From £468 GBP
HK$4,900 HKD
As of October 30, 2026
Save £674 GBP (59%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: £1,944 GBP 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 October 29, 2026, with a 144% 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: Oct 30
Current: £1,944 GBP|Low: £468 GBP|High: £1,944 GBP|Avg: £769 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
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Retailer 8
Retailer 9
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Retailer 11
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Retailer 19
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Retailer 22
Retailer 23
October 31, 2026
Retailer 10£468 GBP
Retailer 2£470 GBP
Retailer 6£553 GBP
Retailer 3£567 GBP
Retailer 8£572 GBP
Retailer 11£594 GBP
Retailer 12£620 GBP
Retailer 22£620 GBP
Retailer 9£628 GBP
Retailer 23£644 GBP
Retailer 15£655 GBP
Retailer 4£716 GBP
Retailer 21£719 GBP
Retailer 5£743 GBP
Retailer 13£747 GBP
Retailer 19£763 GBP
Retailer 14£830 GBP
Retailer 7£864 GBP
Retailer 17£875 GBP
Retailer 16£888 GBP
Retailer 18£957 GBP
Retailer 20£1,142 GBP
NZ Jewellers£1,944 GBP

22 data points across 23 retailers

25 retailers£468 GBP to £1,142 GBP

A
Cheapest Retailer
-
£468 GBP
HK$4,900 HKD
A
Retailer 2
-
£470 GBP
₹59,934 INR
View
A
Retailer 3
-
£553 GBP
$741 USD
View
Retailer 4
-
£567 GBP
$760 USD
View
Price last confirmed 11 days ago
A
Retailer 5
-
£572 GBP
$767 USD
View
Final sale: no returns
B+
Retailer 6
-
£583 GBP
A$1,202 AUD
View
A
Retailer 7
-
£594 GBP
SGD 1,076 SGD
View
B+
Retailer 8
-
£620 GBP
$831 USD
View
B+
Retailer 9
-
£620 GBP
$831 USD
View
B+
Retailer 10
-
£628 GBP
$842 USD
View
B+
Retailer 11
-
£644 GBP
$863 USD
View
B+
Retailer 12
-
£655 GBP
SGD 1,186 SGD
View
B+
Retailer 13
-
£716 GBP
$959 USD
View
B+
Retailer 14
-
£719 GBP
$964 USD
View
B
Retailer 15
-
£743 GBP
$995 USD
View
B+
Retailer 16
-
£747 GBP
View
B+
Retailer 17
-
£763 GBP
View
B+
Retailer 18
-
£830 GBP
$1,112 USD
View
B
Retailer 19
-
£864 GBP
$1,157 USD
View
B+
Retailer 20
-
£875 GBP
€1,117 EUR
View
B
Retailer 21
-
£888 GBP
$1,189 USD
View
B
Retailer 22
-
£957 GBP
ZAR 20,716 ZAR
View
Retailer 23
-
£967 GBP
A$1,993 AUD
View
Price last confirmed 29 days ago
B
Retailer 24
-
£1,142 GBP
View
Most Expensive
NZ Jewellers
4602bb7f-0c81-4db7-90e5-a0a5de6a7b7c · Oct 30
£1,944 GBP
$2,605 USD
View
Price under review
24 more retailers have this diamond
Prices start from £468 GBPSave up to £674 GBP

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
£468 GBP