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Oval|Natural|GIA

0.51ct H SI1 Oval Natural Diamond

GD • H/SI1 • GIA 2556444651

Certificate GIA 2556444651

Diamond specifications and retailer prices

From £333 GBP
As of November 6, 2026
Save £1,006 GBP (75%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £1,340 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 SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2556444651. Listed at 21 retailers as of November 5, 2026, with prices from £333 to £1,340, a £1,006 spread on the same certified stone. NZ Jewellers lists it at £1,340. 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
H
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556444651
Dimensions6.35 × 4.50 × 2.87 mm
L/W Ratio1.41
Girdle conditionFaceted
Key to symbols
Feather, Twinning Wisp, Crystal, Cloud
Top View
6.35 mm4.50 mm0.51 ctH / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateGIA 2556444651
Side View
Table 58.0%CrownGirdle: THK-VTKPavilionCulet: 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: £1,340 GBP|Low: £333 GBP|High: £1,340 GBP|Avg: £581 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
Retailer 17
Retailer 18
Retailer 19
November 6, 2026
Retailer 2£333 GBP
Retailer 8£394 GBP
Retailer 3£427 GBP
Retailer 13£444 GBP
Retailer 5£460 GBP
Retailer 11£460 GBP
Retailer 18£493 GBP
Retailer 19£495 GBP
Retailer 10£498 GBP
Retailer 15£518 GBP
Retailer 12£521 GBP
Retailer 6£525 GBP
Retailer 7£537 GBP
Retailer 4£572 GBP
Retailer 9£607 GBP
Retailer 14£630 GBP
Retailer 16£659 GBP
Retailer 17£986 GBP
NZ Jewellers£1,340 GBP

23 data points across 19 retailers

21 retailers£333 GBP to £1,340 GBP

A
Cheapest Retailer
-
£333 GBP
B+
Retailer 2
-
£363 GBP
View
B+
Retailer 3
-
£394 GBP
View
Final sale: no returns
B+
Retailer 4
-
£427 GBP
View
B+
Retailer 5
-
£444 GBP
View
B+
Retailer 6
-
£460 GBP
View
Retailer 7
-
£460 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£493 GBP
View
B+
Retailer 9
-
£495 GBP
View
B+
Retailer 10
-
£498 GBP
View
B
Retailer 11
-
£518 GBP
View
B+
Retailer 12
-
£521 GBP
View
B
Retailer 13
-
£525 GBP
View
B
Retailer 14
-
£537 GBP
View
B
Retailer 15
-
£572 GBP
View
B
Retailer 16
-
£607 GBP
View
B
Retailer 17
-
£630 GBP
View
Retailer 18
-
£648 GBP
View
Price last confirmed 33 days ago
B
Retailer 19
-
£659 GBP
View
C
Retailer 20
-
£986 GBP
View
Most Expensive
C
NZ Jewellers
dd1940f1-609e-45b9-ade2-9c6db32196c8 · Nov 5
£1,340 GBP
$1,793 USD
View
20 more retailers have this diamond
Prices start from £333 GBPSave up to £1,006 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
£333 GBP