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Oval|Natural|GIA

0.51ct J SI1 Oval Natural Diamond

EX • J/SI1 • GIA 6565801280

Certificate GIA 6565801280

Diamond specifications and retailer prices

From £239 GBP
As of November 6, 2026
Save £992 GBP (81%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,231 GBP at NZ Jewellers · As of November 5, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6565801280. Listed at 16 retailers as of November 5, 2026, with prices from £239 to £1,231, a £992 spread on the same certified stone. NZ Jewellers lists it at £1,231. 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6565801280
Dimensions6.32 × 4.47 × 2.85 mm
L/W Ratio1.41
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Knot
Top View
6.32 mm4.47 mm0.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6565801280
Side View
Table 60.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 63.7%

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: £1,231 GBP|Low: £239 GBP|High: £1,231 GBP|Avg: £470 GBP
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
November 6, 2026
Retailer 10£239 GBP
Retailer 2£294 GBP
Retailer 7£321 GBP
Retailer 9£330 GBP
Retailer 8£346 GBP
Retailer 15£367 GBP
Retailer 11£388 GBP
Retailer 4£388 GBP
Retailer 14£390 GBP
Retailer 16£404 GBP
Retailer 12£415 GBP
Retailer 13£453 GBP
Retailer 5£478 GBP
Retailer 3£498 GBP
Retailer 6£740 GBP
NZ Jewellers£1,231 GBP

5 data points across 16 retailers

16 retailers£239 GBP to £1,231 GBP

A
Cheapest Retailer
-
£239 GBP
A
Retailer 2
-
£294 GBP
View
Final sale: no returns
A
Retailer 3
-
£321 GBP
View
A
Retailer 4
-
£330 GBP
View
A
Retailer 5
-
£346 GBP
View
A
Retailer 6
-
£367 GBP
View
A
Retailer 7
-
£388 GBP
View
B+
Retailer 8
-
£388 GBP
View
A
Retailer 9
-
£390 GBP
View
B+
Retailer 10
-
£404 GBP
View
B+
Retailer 11
-
£415 GBP
View
B+
Retailer 12
-
£453 GBP
View
B+
Retailer 13
-
£478 GBP
View
B
Retailer 14
-
£498 GBP
View
B
Retailer 15
-
£740 GBP
View
Most Expensive
B
NZ Jewellers
9a4e8a39-a3b4-4111-8165-27ef4de888cb · Nov 5
£1,231 GBP
$1,648 USD
View
15 more retailers have this diamond
Prices start from £239 GBPSave up to £992 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
£239 GBP