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Oval|Natural|GIA

0.51ct D SI2 Oval Natural Diamond

GD • D/SI2 • GIA 2507889766

Certificate GIA 2507889766

Diamond specifications and retailer prices

From £493 GBP
As of November 6, 2026
Save £1,201 GBP (71%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,694 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 D colour (colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2507889766. Listed at 11 retailers as of November 5, 2026, with prices from £493 to £1,694, a £1,201 spread on the same certified stone. NZ Jewellers lists it at £1,694. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
D
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 2507889766
Dimensions6.36 × 4.52 × 2.75 mm
L/W Ratio1.41
Top View
6.36 mm4.52 mm0.51 ctD / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 2507889766
Side View
Table 62.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 61.0%

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: £1,694 GBP|Low: £415 GBP|High: £1,759 GBP|Avg: £845 GBP|-3.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 2£493 GBP
Retailer 5£540 GBP
Retailer 7£561 GBP
Retailer 6£582 GBP
Retailer 4£617 GBP
Retailer 9£652 GBP
Retailer 3£755 GBP
Retailer 8£1,025 GBP
NZ Jewellers£1,694 GBP

44 data points across 9 retailers

11 retailers£493 GBP to £1,694 GBP

A
Cheapest Retailer
-
£493 GBP
Final sale: no returns
B+
Retailer 2
-
£540 GBP
View
B+
Retailer 3
-
£561 GBP
View
B+
Retailer 4
-
£570 GBP
View
B+
Retailer 5
-
£582 GBP
View
B+
Retailer 6
-
£617 GBP
View
B
Retailer 7
-
£652 GBP
View
B
Retailer 8
-
£693 GBP
View
B
Retailer 9
-
£755 GBP
View
B
Retailer 10
-
£1,025 GBP
View
Most Expensive
C
NZ Jewellers
b0d7bd41-02c5-4079-803d-9b2a8383066d · Nov 5
£1,694 GBP
$2,267 USD
View
10 more retailers have this diamond
Prices start from £493 GBPSave up to £1,201 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
£493 GBP