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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 $434 USD
As of November 5, 2026
Save $74 USD (15%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $508 USD at MD Diamonds and Jewellers · As of November 5, 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 November 5, 2026, with prices from $434 to $508, a $74 spread on the same certified stone. MD Diamonds and Jewellers lists it at $508. 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: Nov 5
Current: $508 USD|Low: $508 USD|High: $508 USD|Avg: $508 USD
December 30, 2025
MD Diamonds and Jewellers$508 USD

3 data points across 1 retailer

2 retailers$434 USD to $508 USD

B+
Cheapest Retailer
-
$434 USD
Most Expensive
B
MD Diamonds and Jewellers
LG643451574 · Nov 5
$508 USD
£400 GBP
View
1 more retailer has this diamond
Prices start from $434 USDSave up to $74 USD

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
$434 USD