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Radiant|Lab Grown|IGI

1.21ct G VS1 Radiant Lab Grown Diamond

VG • G/VS1 • IGI LG605342045

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

Certificate IGI LG605342045

Diamond specifications and retailer prices

From £148 GBP
As of November 4, 2026
Save £1,123 GBP (88%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,271 GBP at Do Amore Diamonds · As of November 4, 2026
View at Do Amore Diamonds

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 very-good cut grade and certified by IGI LG605342045 or 605342045. Listed at 14 retailers as of November 4, 2026, with prices from £148 to £1,271, a £1,123 spread on the same certified stone. Do Amore Diamonds lists it at £1,271. 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
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.2°
Pavilion angle34.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG605342045
Dimensions7.30 × 5.24 × 3.61 mm
L/W Ratio1.39
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
7.30 mm5.24 mm1.21 ctG / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG605342045
Side View
Table 67.0%Crown 45.2°Girdle: Slightly ThickPavilion 34.6°Culet: NoneDepth 68.9%

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 4
Current: £1,271 GBP|Low: £106 GBP|High: £1,271 GBP|Avg: £494 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 9£148 GBP
Retailer 11£251 GBP
Retailer 8£291 GBP
Retailer 5£311 GBP
Retailer 2£326 GBP
Retailer 10£348 GBP
Retailer 4£440 GBP
Retailer 7£556 GBP
Retailer 3£709 GBP
Retailer 6£844 GBP
Do Amore Diamonds£1,271 GBP

41 data points across 11 retailers

14 retailers£148 GBP to £1,271 GBP

A
Cheapest Retailer
-
£148 GBP
Final sale: no returns
Retailer 2
-
£163 GBP
View
Price last confirmed 33 days ago
A
Retailer 3
-
£251 GBP
View
A
Retailer 4
-
£291 GBP
View
A
Retailer 5
-
£311 GBP
View
A
Retailer 6
-
£326 GBP
View
B+
Retailer 7
-
£348 GBP
View
B+
Retailer 8
-
£440 GBP
View
B
Retailer 9
-
£504 GBP
View
B
Retailer 10
-
£556 GBP
View
Retailer 11
-
£581 GBP
View
Price last confirmed 36 days ago
B
Retailer 12
-
£709 GBP
View
B
Retailer 13
-
£844 GBP
View
Most Expensive
B
Do Amore Diamonds
27-26A1B7DAD · Nov 4
£1,271 GBP
$1,710 USD
View
13 more retailers have this diamond
Prices start from £148 GBPSave up to £1,123 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
£148 GBP