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Radiant|Lab Grown|IGI

1.21ct I VS1 Radiant Lab Grown Diamond

VG • I/VS1 • IGI LG593372671

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

Certificate IGI LG593372671

Diamond specifications and retailer prices

From £227 GBP
As of November 3, 2026
Save £589 GBP (72%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £816 GBP at MOH London · As of November 2, 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 I colour (near-colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG593372671 or 593372671. Listed at 6 retailers as of November 2, 2026, with prices from £227 to £816, a £589 spread on the same certified stone. MOH London lists it at £816. 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
I
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle42.5°
Pavilion angle35.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG593372671
Dimensions7.50 × 5.23 × 3.64 mm
L/W Ratio1.43
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment.
Top View
7.50 mm5.23 mm1.21 ctI / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG593372671
Side View
Table 57.0%Crown 42.5°Girdle: Slightly ThickPavilion 35.6°Culet: NoneDepth 69.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 3
Current: £816 GBP|Low: £227 GBP|High: £826 GBP|Avg: £460 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 5£227 GBP
Retailer 3£283 GBP
Retailer 2£301 GBP
Retailer 4£344 GBP
Retailer 7£567 GBP
Retailer 6£690 GBP
MOH London£816 GBP

16 data points across 7 retailers

6 retailers£227 GBP to £816 GBP

A
Cheapest Retailer
-
£227 GBP
B+
Retailer 2
-
£283 GBP
View
A
Retailer 3
-
£301 GBP
View
B+
Retailer 4
-
£344 GBP
View
B
Retailer 5
-
£690 GBP
View
Most Expensive
B
MOH London
LG593372671 · Nov 2
£816 GBP
View
5 more retailers have this diamond
Prices start from £227 GBPSave up to £589 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.

A
1.21ct Radiant
£227 GBP