Radiant|Lab Grown|IGI

1.21ct G VS1 Radiant Lab Grown Diamond

ID • G/VS1 • IGI LG617452464

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

Certificate IGI LG617452464

Diamond specifications and retailer prices

From £525 GBP
As of October 30, 2026
Save £3 GBP (1%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,092 GBP at Do Amore Diamonds · As of October 29, 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 top-tier cut grade and certified by IGI LG617452464 or 617452464. Listed at 10 retailers as of October 29, 2026, with a relatively tight 1% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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 angle43.6°
Pavilion angle35.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG617452464
Dimensions7.57 × 5.17 × 3.49 mm
L/W Ratio1.46
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
7.57 mm5.17 mm1.21 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG617452464
Side View
Table 65.0%Crown 43.6°Girdle: THN-MEDPavilion 35.5°Culet: NoneDepth 67.5%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 30
Current: £1,092 GBP|Low: £111 GBP|High: £1,114 GBP|Avg: £536 GBP|-2.0%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 26, 2026
Retailer 6£114 GBP
Retailer 4£132 GBP
Retailer 9£257 GBP
Retailer 2£378 GBP
Retailer 5£478 GBP
Retailer 7£499 GBP
Retailer 10£525 GBP
Retailer 8£528 GBP
Retailer 3£727 GBP
Do Amore Diamonds£1,092 GBP

22 data points across 10 retailers

10 retailers£525 GBP to £528 GBP

Retailer 1
-
£114 GBP
Price last confirmed 9 days ago
Retailer 2
-
£132 GBP
View
Price last confirmed 8 days ago
Retailer 3
-
£257 GBP
View
Price last confirmed 8 days ago
Retailer 4
-
£378 GBP
View
Price last confirmed 10 days ago
Retailer 5
-
£478 GBP
View
Price last confirmed 10 days ago
Retailer 6
-
£499 GBP
View
Price last confirmed 8 days ago
B+
Retailer 7
-
£525 GBP
View
B+
Retailer 8
-
£528 GBP
View
Retailer 9
-
£727 GBP
View
Price last confirmed 11 days ago
Most Expensive
Do Amore Diamonds
27-5303D1F0B · Oct 29
£1,092 GBP
$1,470 USD
View
Price last confirmed 7 days ago
9 more retailers have this diamond
Prices start from £525 GBPSave up to £3 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.

B+
1.21ct Radiant
£525 GBP