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Radiant|Lab Grown|IGI

1.27ct F SI1 Radiant Lab Grown Diamond

EX • F/SI1 • IGI LG638457132

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

Certificate IGI LG638457132

Diamond specifications and retailer prices

From $460 USD
£362 GBP
As of November 5, 2026
1 retailer carries this diamond
Only listing: $460 USD at Diamond Quarter
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Diamond Quarter

About this 1.27ct lab-grown radiant diamond

This 1.27ct lab-grown radiant sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG638457132 or 638457132. Listed at a single retailer as of November 5, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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

1.27
Carat
F
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.2°
Pavilion angle34.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG638457132
Dimensions7.75 × 5.32 × 3.54 mm
L/W Ratio1.46
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.75 mm5.32 mm1.27 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG638457132
Side View
Table 63.0%Crown 40.2°Girdle: Slightly ThickPavilion 34.1°CuletDepth 66.5%

Caratlytics Score

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

Last verified: Nov 5
Current: $460 USD|Low: $460 USD|High: $460 USD|Avg: $460 USD
September 26, 2026
Diamond Quarter$460 USD

1 data point across 1 retailer

1 retailer

B+
Diamond Quarter
1.27SI1FLG32444BN · Nov 5
$460 USD
£362 GBP
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B+
1.27ct Radiant
$460 USD