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Oval|Natural|IGI

0.51ct H SI1 Oval Natural Diamond

VG • H/SI1 • IGI 815682447

Shape and cutting style on the report: Oval brilliant

Certificate IGI 815682447

Diamond specifications and retailer prices

From £295 GBP
As of November 6, 2026
Save £932 GBP (76%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,228 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 very-good cut grade and certified by IGI 815682447. Listed at 13 retailers as of November 5, 2026, with prices from £295 to £1,228, a £932 spread on the same certified stone. NZ Jewellers lists it at £1,228. 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
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle41.5°
Pavilion angle29.3°
OriginNatural
Grading LabIGI
CertificateIGI 815682447
Dimensions7.09 × 4.27 × 2.43 mm
L/W Ratio1.66
Girdle conditionFaceted
Top View
7.09 mm4.27 mm0.51 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateIGI 815682447
Side View
Table 59.0%Crown 41.5°Girdle: STK-THKPavilion 29.3°Culet: NoneDepth 56.9%

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: £1,228 GBP|Low: £295 GBP|High: £1,228 GBP|Avg: £462 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
November 6, 2026
Retailer 3£295 GBP
Retailer 10£295 GBP
Retailer 9£321 GBP
Retailer 11£345 GBP
Retailer 8£370 GBP
Retailer 2£391 GBP
Retailer 4£401 GBP
Retailer 6£408 GBP
Retailer 5£437 GBP
Retailer 7£478 GBP
Retailer 12£530 GBP
Retailer 13£740 GBP
NZ Jewellers£1,228 GBP

19 data points across 13 retailers

13 retailers£295 GBP to £1,228 GBP

Retailer 1
-
£295 GBP
Price last confirmed 10 days ago
A
Retailer 2
-
£295 GBP
View
Final sale: no returns
A
Retailer 3
-
£321 GBP
View
B+
Retailer 4
-
£345 GBP
View
B+
Retailer 5
-
£370 GBP
View
B+
Retailer 6
-
£391 GBP
View
B+
Retailer 7
-
£401 GBP
View
B+
Retailer 8
-
£408 GBP
View
B+
Retailer 9
-
£437 GBP
View
B+
Retailer 10
-
£478 GBP
View
B+
Retailer 11
-
£530 GBP
View
B
Retailer 12
-
£740 GBP
View
Most Expensive
C
NZ Jewellers
8a48c500-bc0c-4c1d-83d9-4875933a4a41 · Nov 5
£1,228 GBP
$1,643 USD
View
12 more retailers have this diamond
Prices start from £295 GBPSave up to £932 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
£295 GBP