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Radiant|Lab Grown|IGI

1.03ct G SI1 Radiant Lab Grown Diamond

ID • G/SI1 • IGI LG620457800

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG620457800

Diamond specifications and retailer prices

From £436 GBP
As of November 5, 2026
7 retailers carry this diamond
Most expensive: £626 GBP at MOH London · As of October 15, 2026
View at MOH London

About this 1.03ct lab-grown radiant diamond

This 1.03ct lab-grown radiant 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 LG620457800 or 620457800. Listed at 7 retailers as of November 5, 2026. 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

1.03
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.6°
Pavilion angle34.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620457800
Dimensions7.11 × 4.99 × 3.39 mm
L/W Ratio1.42
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
7.11 mm4.99 mm1.03 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620457800
Side View
Table 65.0%Crown 40.6°Girdle: MED-STKPavilion 34.8°Culet: NoneDepth 67.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 5
Current: £626 GBP|Low: £93 GBP|High: £1,038 GBP|Avg: £390 GBP|+3.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 17, 2026
Retailer 7£97 GBP
Retailer 9£108 GBP
Retailer 10£194 GBP
Retailer 5£220 GBP
Retailer 11£312 GBP
Retailer 3£350 GBP
Retailer 4£408 GBP
Retailer 8£411 GBP
Retailer 6£461 GBP
MOH London£626 GBP
Retailer 2£1,038 GBP

14 data points across 11 retailers

7 retailers

Retailer 1
-
£97 GBP
Price last confirmed 30 days ago
Retailer 2
-
£112 GBP
View
Price last confirmed 24 days ago
Retailer 3
-
£220 GBP
View
Price last confirmed 22 days ago
Retailer 4
-
£411 GBP
View
Price last confirmed 22 days ago
Retailer 5
-
£426 GBP
View
Price last confirmed 38 days ago
B
Retailer 6
-
£436 GBP
View
Most Expensive
MOH London
LG620457800 · Oct 15
£626 GBP
View
Price last confirmed 22 days ago
6 more retailers have this diamond
Prices start from £436 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
1.03ct Radiant
£436 GBP