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Radiant|Lab Grown|IGI

1.21ct H VS1 Radiant Lab Grown Diamond

EX • H/VS1 • IGI LG642493045

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

Certificate IGI LG642493045

Diamond specifications and retailer prices

From £313 GBP
As of November 5, 2026
1 retailer carries this diamond
Only listing: £313 GBP 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 1.21ct lab-grown radiant diamond

This 1.21ct lab-grown radiant sits in the classic one-carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG642493045 or 642493045. 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. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
H
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.1°
Pavilion angle35.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG642493045
Dimensions7.67 × 5.28 × 3.57 mm
L/W Ratio1.45
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.67 mm5.28 mm1.21 ctH / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG642493045
Side View
Table 66.0%Crown 44.1°Girdle: MediumPavilion 35.5°CuletDepth 67.6%

Caratlytics Score

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

Last verified: Nov 5
Current: £313 GBP|Low: £313 GBP|High: £313 GBP|Avg: £313 GBP
September 26, 2026
Diamond Quarter£313 GBP

1 data point across 1 retailer

1 retailer

B+
Diamond Quarter
1.21VS1HLG450B34N · Nov 5
£313 GBP
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B+
1.21ct Radiant
£313 GBP