CaratHunter
Plans
Oval|Natural|GIA

0.51ct H SI2 Oval Natural Diamond

EX • H/SI2 • GIA 5566631743

Certificate GIA 5566631743

Diamond specifications and retailer prices

From £270 GBP
As of November 6, 2026
Save £948 GBP (78%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,219 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 H 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 5566631743. Listed at 10 retailers as of November 5, 2026, with prices from £270 to £1,219, a £948 spread on the same certified stone. NZ Jewellers lists it at £1,219. 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
H
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5566631743
Dimensions6.25 × 4.36 × 2.79 mm
L/W Ratio1.43
Girdle conditionVery Thick
Top View
6.25 mm4.36 mm0.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 5566631743
Side View
Table 61.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 64.1%

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: £1,219 GBP|Low: £270 GBP|High: £1,219 GBP|Avg: £559 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 9£270 GBP
Retailer 2£287 GBP
Retailer 3£461 GBP
Retailer 5£482 GBP
Retailer 7£486 GBP
Retailer 8£493 GBP
Retailer 4£578 GBP
Retailer 6£897 GBP
NZ Jewellers£1,219 GBP

10 data points across 9 retailers

10 retailers£270 GBP to £1,219 GBP

A
Cheapest Retailer
-
£270 GBP
Final sale: no returns
A
Retailer 2
-
£287 GBP
View
A
Retailer 3
-
£390 GBP
View
A
Retailer 4
-
£461 GBP
View
B+
Retailer 5
-
£482 GBP
View
B+
Retailer 6
-
£486 GBP
View
B+
Retailer 7
-
£493 GBP
View
B+
Retailer 8
-
£578 GBP
View
B
Retailer 9
-
£897 GBP
View
Most Expensive
B
NZ Jewellers
0db0b06e-da52-41e3-9fdf-3d1329776e91 · Nov 5
£1,219 GBP
$1,631 USD
View
9 more retailers have this diamond
Prices start from £270 GBPSave up to £948 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
£270 GBP