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Oval|Lab Grown|IGI

1.00ct G SI1 Oval Lab Grown Diamond

ID • G/SI1 • IGI LG512220539

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG512220539

Diamond specifications and retailer prices

From £450 GBP
As of November 5, 2026
Save £933 GBP (67%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,466 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1ct lab-grown oval diamond

This 1ct lab-grown oval sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG512220539 or 512220539. Listed at 12 retailers as of November 4, 2026, with a 207% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.00
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG512220539
Dimensions7.98 × 5.53 × 3.44 mm
L/W Ratio1.44
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.98 mm5.53 mm1.00 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG512220539
Side View
Table 64.5%Crown 36.4°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 62.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £863 GBP|Low: £432 GBP|High: £2,448 GBP|Avg: £878 GBP|+1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 7£450 GBP
Retailer 10£503 GBP
Retailer 2£557 GBP
Retailer 8£557 GBP
Retailer 4£628 GBP
Retailer 5£654 GBP
Retailer 9£855 GBP
Retailer 1£863 GBP
Retailer 6£1,383 GBP
Retailer 3£2,419 GBP

44 data points across 10 retailers

12 retailers£450 GBP to £1,383 GBP

B+
Cheapest Retailer
-
£450 GBP
B+
Retailer 2
-
£503 GBP
View
Final sale: no returns
B+
Retailer 3
-
£504 GBP
View
Retailer 4
-
£557 GBP
View
Price last confirmed 21 days ago
B
Retailer 5
-
£557 GBP
View
B
Retailer 6
-
£628 GBP
View
B
Retailer 7
-
£654 GBP
View
B
Retailer 8
-
£855 GBP
View
B
Retailer 9
-
£863 GBP
View
B
Retailer 10
-
£1,383 GBP
View
Most Expensive
NZ Jewellers
3e00e0bf-0ea7-4a0c-ac1c-88c684236d0d · Nov 5
£1,466 GBP
$1,962 USD
View
Price under review
10 more retailers have this diamond
Prices start from £450 GBPSave up to £933 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.

B+
1.00ct Oval
£450 GBP