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Radiant|Lab Grown|IGI

1.21ct G VS1 Radiant Lab Grown Diamond

ID • G/VS1 • IGI LG570363543

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

Certificate IGI LG570363543

Diamond specifications and retailer prices

From £118 GBP
As of November 4, 2026
Save £652 GBP (85%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £770 GBP at Flawless Fine Jewelry · As of November 4, 2026
View at Flawless Fine Jewelry

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 top-tier cut grade and certified by IGI LG570363543 or 570363543. Listed at 18 retailers as of November 4, 2026, with prices from £118 to £770, a £652 spread on the same certified stone. Flawless Fine Jewelry lists it at £770. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle47.7°
Pavilion angle31.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG570363543
Dimensions7.06 × 5.25 × 3.60 mm
L/W Ratio1.34
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
7.06 mm5.25 mm1.21 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG570363543
Side View
Table 65.5%Crown 47.7°Girdle: MediumPavilion 31.3°Culet: NoneDepth 68.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: £770 GBP|Low: £93 GBP|High: £793 GBP|Avg: £317 GBP|-2.9%
Flawless Fine Jewelry
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 4, 2026
Retailer 14£118 GBP
Retailer 4£137 GBP
Retailer 8£137 GBP
Retailer 6£146 GBP
Retailer 15£146 GBP
Retailer 9£171 GBP
Retailer 12£247 GBP
Retailer 11£253 GBP
Retailer 3£265 GBP
Retailer 16£295 GBP
Retailer 5£318 GBP
Retailer 7£333 GBP
Retailer 10£357 GBP
Retailer 17£472 GBP
Retailer 13£498 GBP
Retailer 2£684 GBP
Flawless Fine Jewelry£770 GBP

28 data points across 17 retailers

18 retailers£118 GBP to £770 GBP

A
Cheapest Retailer
-
£118 GBP
A
Retailer 2
-
£137 GBP
View
Final sale: no returns
A
Retailer 3
-
£137 GBP
View
Retailer 4
-
£146 GBP
View
Price last confirmed 11 days ago
A
Retailer 5
-
£146 GBP
View
A
Retailer 6
-
£171 GBP
View
A
Retailer 7
-
£247 GBP
View
A
Retailer 8
-
£253 GBP
View
B+
Retailer 9
-
£265 GBP
View
Retailer 10
-
£295 GBP
View
Price last confirmed 31 days ago
A
Retailer 11
-
£318 GBP
View
A
Retailer 12
-
£333 GBP
View
A
Retailer 13
-
£357 GBP
View
B+
Retailer 14
-
£388 GBP
View
B+
Retailer 15
-
£472 GBP
View
B
Retailer 16
-
£498 GBP
View
B
Retailer 17
-
£684 GBP
View
Most Expensive
B
Flawless Fine Jewelry
867B905EA · Nov 4
£770 GBP
View
17 more retailers have this diamond
Prices start from £118 GBPSave up to £652 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
£118 GBP