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Oval|Lab Grown|IGI

1.05ct E SI1 Oval Lab Grown Diamond

EX • E/SI1 • IGI LG850631385

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG850631385

Diamond specifications and retailer prices

From £253 GBP
As of November 3, 2026
Save £226 GBP (47%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £478 GBP at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 1.05ct lab-grown oval diamond

This 1.05ct lab-grown oval sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG850631385 or 850631385. Listed at 2 retailers as of November 3, 2026, with prices from £253 to £478, a £226 spread on the same certified stone. Brilliant Earth lists it at £478. 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

1.05
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG850631385
Dimensions8.20 × 5.92 × 3.57 mm
L/W Ratio1.39
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.20 mm5.92 mm1.05 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG850631385
Side View
Table 60.0%Crown 34.1°Girdle: MED-STKPavilion 41°Culet: NoneDepth 60.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 3
Current: £253 GBP|Low: £253 GBP|High: £255 GBP|Avg: £254 GBP|-0.9%
November 3, 2026
Retailer 1£253 GBP

4 data points across 1 retailer

2 retailers£253 GBP to £478 GBP

A
Cheapest Retailer
-
£253 GBP
Most Expensive
B
Brilliant Earth
22378438A · Nov 6
£478 GBP
$640 USD
View
1 more retailer has this diamond
Prices start from £253 GBPSave up to £226 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
1.05ct Oval
£253 GBP