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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 $422 USD
£332 GBP
As of November 2, 2026
Save $65 USD (13%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $486 USD at MD Diamonds and Jewellers · As of November 2, 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 2, 2026, with prices from $422 to $486, a $65 spread on the same certified stone. MD Diamonds and Jewellers lists it at $486. 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
Color
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

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

Last verified: Nov 2
Current: $486 USD|Low: $422 USD|High: $486 USD|Avg: $473 USD
MD Diamonds and Jewellers
Retailer 2
September 26, 2026
Retailer 2$422 USD
MD Diamonds and Jewellers$486 USD

4 data points across 2 retailers

2 retailers$422 USD to $486 USD

B+
Cheapest Retailer
-
$422 USD
£332 GBP
Most Expensive
B
MD Diamonds and Jewellers
LG638406660 · Nov 2
$486 USD
£383 GBP
View
1 more retailer has this diamond
Prices start from $422 USDSave up to $65 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+
1.05ct Radiant
$422 USD