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Radiant|Lab Grown|IGI

1.21ct D VS2 Radiant Lab Grown Diamond

VG • D/VS2 • IGI LG550227491

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

Certificate IGI LG550227491

Diamond specifications and retailer prices

From £136 GBP
As of November 4, 2026
Save £568 GBP (81%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £704 GBP at MOH London · As of November 1, 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 D colour (colourless) and VS2 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG550227491 or 550227491. Listed at 14 retailers as of November 1, 2026, with prices from £136 to £704, a £568 spread on the same certified stone. MOH London lists it at £704. 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
D
Colour
VS2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.7°
Pavilion angle30.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG550227491
Dimensions6.67 × 5.39 × 3.67 mm
L/W Ratio1.24
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.67 mm5.39 mm1.21 ctD / VS2
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG550227491
Side View
Table 63.0%Crown 41.7°Girdle: STK-THKPavilion 30.8°Culet: NoneDepth 68.1%

Caratlytics Score

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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 4
Current: £704 GBP|Low: £136 GBP|High: £712 GBP|Avg: £322 GBP|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 4, 2026
Retailer 8£136 GBP
Retailer 4£141 GBP
Retailer 5£150 GBP
Retailer 2£179 GBP
Retailer 3£264 GBP
Retailer 10£271 GBP
Retailer 7£325 GBP
Retailer 9£391 GBP
Retailer 6£511 GBP
MOH London£704 GBP

30 data points across 10 retailers

14 retailers£136 GBP to £704 GBP

Retailer 1
-
£116 GBP
Price last confirmed 31 days ago
A
Retailer 2
-
£136 GBP
View
Final sale: no returns
A
Retailer 3
-
£141 GBP
View
Retailer 4
-
£150 GBP
View
Price last confirmed 31 days ago
Retailer 5
-
£150 GBP
View
Price last confirmed 19 days ago
A
Retailer 6
-
£179 GBP
View
A
Retailer 7
-
£264 GBP
View
A
Retailer 8
-
£271 GBP
View
B+
Retailer 9
-
£325 GBP
View
B+
Retailer 10
-
£391 GBP
View
Retailer 11
-
£484 GBP
View
Price last confirmed 32 days ago
B
Retailer 12
-
£511 GBP
View
B
Retailer 13
-
£524 GBP
View
Most Expensive
B
MOH London
LG550227491 · Nov 1
£704 GBP
View
13 more retailers have this diamond
Prices start from £136 GBPSave up to £568 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
£136 GBP