Radiant|Lab Grown|IGI

1.21ct G VS1 Radiant Lab Grown Diamond

ID • G/VS1 • IGI LG579399792

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

Certificate IGI LG579399792

Diamond specifications and retailer prices

From £423 GBP
As of November 5, 2026
11 retailers carry this diamond
Most expensive: £853 GBP at MOH London · As of October 15, 2026
View at MOH London

About this 1.21ct lab-grown radiant diamond

This 1.21ct lab-grown radiant sits in the classic one-carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG579399792 or 579399792. Listed at 11 retailers as of November 5, 2026. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41°
Pavilion angle35.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG579399792
Dimensions7.71 × 5.19 × 3.55 mm
L/W Ratio1.49
Culet sizePointed
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
7.71 mm5.19 mm1.21 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG579399792
Side View
Table 65.0%Crown 41°Girdle: MED-STKPavilion 35.5°Culet: NoneDepth 68.4%

Caratlytics Score

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

Last verified: Nov 5
Current: £853 GBP|Low: £146 GBP|High: £1,256 GBP|Avg: £472 GBP|+0.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 15, 2026
Retailer 11£146 GBP
Retailer 6£221 GBP
Retailer 2£223 GBP
Retailer 3£251 GBP
Retailer 5£308 GBP
Retailer 4£322 GBP
Retailer 10£435 GBP
Retailer 8£502 GBP
Retailer 9£708 GBP
MOH London£853 GBP
Retailer 7£988 GBP

22 data points across 11 retailers

11 retailers

Retailer 1
-
£132 GBP
Price last confirmed 25 days ago
Retailer 2
-
£153 GBP
View
Price last confirmed 22 days ago
Retailer 3
-
£163 GBP
View
Price last confirmed 24 days ago
Retailer 4
-
£163 GBP
View
Price last confirmed 26 days ago
Retailer 5
-
£221 GBP
View
Price last confirmed 22 days ago
Retailer 6
-
£308 GBP
View
Price last confirmed 23 days ago
Retailer 7
-
£322 GBP
View
Price last confirmed 22 days ago
B+
Retailer 8
-
£423 GBP
View
Retailer 9
-
£580 GBP
View
Price last confirmed 26 days ago
Retailer 10
-
£708 GBP
View
Price last confirmed 22 days ago
Most Expensive
MOH London
LG579399792 · Oct 15
£853 GBP
View
Price last confirmed 21 days ago
10 more retailers have this diamond
Prices start from £423 GBP

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+
1.21ct Radiant
£423 GBP