Radiant|Lab Grown|IGI

1.21ct G VS2 Radiant Lab Grown Diamond

GD • G/VS2 • IGI LG678563898

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

Certificate IGI LG678563898

Diamond specifications and retailer prices

From £337 GBP
$452 USD
As of November 1, 2026
Save £70 GBP (17%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £407 GBP at Diamond Quarter · As of October 31, 2026
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 G colour (near-colourless) and VS2 clarity (very-slightly-included), with a standard cut grade and certified by IGI LG678563898 or 678563898. Listed at 2 retailers as of October 31, 2026, with prices from £337 to £407, a £70 spread on the same certified stone. Diamond Quarter lists it at £407. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
G
Colour
VS2
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.8°
Pavilion angle35.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG678563898
Dimensions7.65 × 5.15 × 3.51 mm
L/W Ratio1.49
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.65 mm5.15 mm1.21 ctG / VS2
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG678563898
Side View
Table 66.0%Crown 42.8°Girdle: MediumPavilion 35.5°Culet: NoneDepth 68.2%

Caratlytics Score

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

Last verified: Nov 1
Current: £337 GBP|Low: £331 GBP|High: £479 GBP|Avg: £422 GBP|-9.1%
Retailer 1
Retailer 2
September 23, 2026
Retailer 1£337 GBP
Retailer 2£479 GBP

4 data points across 2 retailers

2 retailers£337 GBP to £407 GBP

B+
Cheapest Retailer
-
£337 GBP
$452 USD
Most Expensive
B
Diamond Quarter
1.21VS2GLG98DC0BN · Oct 31
£407 GBP
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1 more retailer has this diamond
Prices start from £337 GBPSave up to £70 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
£337 GBP