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Radiant|Lab Grown|IGI

1.21ct D VVS1 Radiant Lab Grown Diamond

ID • D/VVS1 • IGI LG846663320

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

Certificate IGI LG846663320

Diamond specifications and retailer prices

From £186 GBP
As of November 3, 2026
Save £610 GBP (77%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £796 GBP at MOH London · As of November 5, 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 VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG846663320 or 846663320. Listed at 9 retailers as of November 3, 2026, with prices from £186 to £796, a £610 spread on the same certified stone. MOH London lists it at £796. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
D
Colour
VVS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.6°
Pavilion angle34°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846663320
Dimensions7.54 × 5.35 × 3.52 mm
L/W Ratio1.41
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
7.54 mm5.35 mm1.21 ctD / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846663320
Side View
Table 63.0%Crown 39.6°Girdle: Slightly ThickPavilion 34°Culet: NoneDepth 65.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 3
Current: £796 GBP|Low: £186 GBP|High: £802 GBP|Avg: £474 GBP|-0.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 5£186 GBP
Retailer 2£227 GBP
Retailer 9£340 GBP
Retailer 3£406 GBP
Retailer 7£443 GBP
Retailer 4£487 GBP
Retailer 6£642 GBP
Retailer 8£681 GBP
MOH London£796 GBP

10 data points across 9 retailers

9 retailers£186 GBP to £796 GBP

A
Cheapest Retailer
-
£186 GBP
A
Retailer 2
-
£227 GBP
View
A
Retailer 3
-
£340 GBP
View
B+
Retailer 4
-
£406 GBP
View
B+
Retailer 5
-
£443 GBP
View
B+
Retailer 6
-
£487 GBP
View
B
Retailer 7
-
£642 GBP
View
B
Retailer 8
-
£681 GBP
View
Most Expensive
B
MOH London
LG846663320 · Nov 5
£796 GBP
View
8 more retailers have this diamond
Prices start from £186 GBPSave up to £610 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
£186 GBP