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Radiant|Lab Grown|IGI

1.09ct G SI1 Radiant Lab Grown Diamond

G/SI1 • IGI LG643451574

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

Certificate IGI LG643451574

Diamond specifications and retailer prices

From €389 EUR
£342 GBP
As of October 31, 2026
Save €66 EUR (14%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: €455 EUR at MD Diamonds and Jewellers · As of October 29, 2026
View at MD Diamonds and Jewellers

About this 1.09ct lab-grown radiant diamond

This 1.09ct lab-grown radiant sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included) and certified by IGI LG643451574 or 643451574. Listed at 2 retailers as of October 29, 2026, with prices from €389 to €455, a €66 spread on the same certified stone. MD Diamonds and Jewellers lists it at €455. 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

1.09
Carat
G
Color
SI1
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.3°
Pavilion angle36.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG643451574
Dimensions7.37 × 5.09 × 3.43 mm
L/W Ratio1.45
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.37 mm5.09 mm1.09 ctG / SI1
OriginLab Grown
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG643451574
Side View
Table 66.0%Crown 43.3°Girdle: MediumPavilion 36.1°Culet: NoneDepth 67.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 31
Current: €455 EUR|Low: €455 EUR|High: €455 EUR|Avg: €455 EUR
December 30, 2025
MD Diamonds and Jewellers€455 EUR

3 data points across 1 retailer

2 retailers€389 EUR to €455 EUR

B+
Cheapest Retailer
-
€389 EUR
£342 GBP
Most Expensive
B
MD Diamonds and Jewellers
LG643451574 · Oct 29
€455 EUR
£400 GBP
View
1 more retailer has this diamond
Prices start from €389 EURSave up to €66 EUR

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+
1.09ct Radiant
€389 EUR