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Radiant|Lab Grown|IGI

1.20ct G SI1 Radiant Lab Grown Diamond

EX • G/SI1 • IGI LG630452443

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

Certificate IGI LG630452443

Diamond specifications and retailer prices

From $424 USD
£334 GBP
As of October 31, 2026
Save $89 USD (17%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $513 USD at MD Diamonds and Jewellers · As of October 29, 2026
View at MD Diamonds and Jewellers

About this 1.2ct lab-grown radiant diamond

This 1.2ct 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 LG630452443 or 630452443. Listed at 2 retailers as of October 29, 2026, with prices from $424 to $513, a $89 spread on the same certified stone. MD Diamonds and Jewellers lists it at $513. 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

1.20
Carat
G
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.2°
Pavilion angle35.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG630452443
Dimensions7.41 × 5.33 × 3.49 mm
L/W Ratio1.39
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
7.41 mm5.33 mm1.20 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG630452443
Side View
Table 69.0%Crown 43.2°Girdle: MED-STKPavilion 35.2°Culet: NoneDepth 65.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 31
Current: $513 USD|Low: $424 USD|High: $513 USD|Avg: $495 USD
MD Diamonds and Jewellers
Retailer 2
September 26, 2026
Retailer 2$424 USD
MD Diamonds and Jewellers$513 USD

4 data points across 2 retailers

2 retailers$424 USD to $513 USD

A
Cheapest Retailer
-
$424 USD
£334 GBP
Most Expensive
B+
MD Diamonds and Jewellers
LG630452443 · Oct 29
$513 USD
£404 GBP
View
1 more retailer has this diamond
Prices start from $424 USDSave up to $89 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.

A
1.20ct Radiant
$424 USD