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Radiant|Lab Grown|IGI

1.05ct G SI1 Radiant Lab Grown Diamond

EX • G/SI1 • IGI LG638406660

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

Certificate IGI LG638406660

Diamond specifications and retailer prices

From £315 GBP
As of November 5, 2026
Save £49 GBP (13%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £363 GBP at MD Diamonds and Jewellers · As of November 5, 2026
View at MD Diamonds and Jewellers

About this 1.05ct lab-grown radiant diamond

This 1.05ct 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 LG638406660 or 638406660. Listed at 2 retailers as of November 5, 2026, with prices from £315 to £363, a £49 spread on the same certified stone. MD Diamonds and Jewellers lists it at £363. 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.5°
Pavilion angle35.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG638406660
Dimensions7.15 × 4.95 × 3.40 mm
L/W Ratio1.44
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.15 mm4.95 mm1.05 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG638406660
Side View
Table 65.0%Crown 45.5°Girdle: MediumPavilion 35.3°Culet: NoneDepth 68.7%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 5
Current: £363 GBP|Low: £315 GBP|High: £363 GBP|Avg: £354 GBP
MD Diamonds and Jewellers
Retailer 2
September 26, 2026
Retailer 2£315 GBP
MD Diamonds and Jewellers£363 GBP

4 data points across 2 retailers

2 retailers£315 GBP to £363 GBP

B+
Cheapest Retailer
-
£315 GBP
Most Expensive
B
MD Diamonds and Jewellers
LG638406660 · Nov 5
£363 GBP
View
1 more retailer has this diamond
Prices start from £315 GBPSave up to £49 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+
1.05ct Radiant
£315 GBP