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Oval|Natural|GIA

0.51ct G SI2 Oval Natural Diamond

EX • G/SI2 • GIA 2556761535

Certificate GIA 2556761535

Diamond specifications and retailer prices

From £285 GBP
As of November 6, 2026
Save £1,023 GBP (78%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £1,369 GBP at NZ Jewellers · As of September 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 G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2556761535. Listed at 19 retailers as of November 5, 2026, with a 358% 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
G
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
Crown angle34.7°
Pavilion angle39.6°
OriginNatural
Grading LabGIA
CertificateGIA 2556761535
Dimensions6.32 × 4.64 × 2.76 mm
L/W Ratio1.36
Girdle conditionFaceted
Culet sizeNone
Top View
6.32 mm4.64 mm0.51 ctG / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 2556761535
Side View
Table 63.0%Crown 34.7°Girdle: MED-THKPavilion 39.6°Culet: NoneDepth 59.4%

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 6
Current: £1,308 GBP|Low: £264 GBP|High: £1,369 GBP|Avg: £446 GBP|-4.5%
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
November 6, 2026
Retailer 9£264 GBP
Retailer 6£285 GBP
Retailer 7£291 GBP
Retailer 4£309 GBP
Retailer 3£325 GBP
Retailer 16£333 GBP
Retailer 17£333 GBP
Retailer 14£357 GBP
Retailer 2£386 GBP
Retailer 5£390 GBP
Retailer 8£391 GBP
Retailer 10£405 GBP
Retailer 12£418 GBP
Retailer 15£429 GBP
Retailer 11£513 GBP
Retailer 13£787 GBP
NZ Jewellers£1,308 GBP

30 data points across 17 retailers

19 retailers£285 GBP to £1,308 GBP

Retailer 1
-
£264 GBP
Price last confirmed 22 days ago
A
Retailer 2
-
£285 GBP
View
Final sale: no returns
Retailer 3
-
£291 GBP
View
Price last confirmed 9 days ago
A
Retailer 4
-
£309 GBP
View
A
Retailer 5
-
£325 GBP
View
Retailer 6
-
£333 GBP
View
Price last confirmed 8 days ago
A
Retailer 7
-
£333 GBP
View
A
Retailer 8
-
£357 GBP
View
Retailer 9
-
£373 GBP
View
Price last confirmed 21 days ago
A
Retailer 10
-
£386 GBP
View
A
Retailer 11
-
£390 GBP
View
A
Retailer 12
-
£391 GBP
View
A
Retailer 13
-
£405 GBP
View
A
Retailer 14
-
£418 GBP
View
A
Retailer 15
-
£429 GBP
View
B+
Retailer 16
-
£513 GBP
View
B
Retailer 17
-
£787 GBP
View
B
Retailer 18
-
£1,308 GBP
View
Most Expensive
NZ Jewellers
9e429250-2206-4f0c-994c-efa0161c3e00 · Sep 30
£1,369 GBP
$1,833 USD
View
Price last confirmed 37 days ago
18 more retailers have this diamond
Prices start from £285 GBPSave up to £1,023 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
£285 GBP