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Cushion|Lab Grown|IGI

1.21ct F VS1 Cushion Lab Grown Diamond

EX • F/VS1 • IGI LG620454308

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG620454308

Diamond specifications and retailer prices

From £217 GBP
As of November 2, 2026
Save £1,057 GBP (83%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £1,274 GBP at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

About this 1.21ct lab-grown cushion diamond

This 1.21ct lab-grown cushion sits in the classic one-carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG620454308 or 620454308. Listed at 6 retailers as of November 2, 2026, with prices from £217 to £1,274, a £1,057 spread on the same certified stone. Do Amore Diamonds lists it at £1,274. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
F
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620454308
Dimensions6.15 × 6.12 × 4.03 mm
L/W Ratio1.00
Girdle conditionFaceted
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
6.15 mm6.12 mm1.21 ctF / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620454308
Side View
Table 61.0%Crown 34.6°Girdle: MED-THKPavilion 39.1°Culet: NoneDepth 65.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 2
Current: £1,274 GBP|Low: £217 GBP|High: £1,274 GBP|Avg: £518 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 3£217 GBP
Retailer 5£291 GBP
Retailer 6£319 GBP
Retailer 10£329 GBP
Retailer 8£343 GBP
Retailer 9£394 GBP
Retailer 2£442 GBP
Retailer 7£733 GBP
Retailer 4£852 GBP
Do Amore Diamonds£1,274 GBP

40 data points across 10 retailers

6 retailers£217 GBP to £1,274 GBP

A
Cheapest Retailer
-
£217 GBP
A
Retailer 2
-
£291 GBP
$391 USD
View
A
Retailer 3
-
£369 GBP
$495 USD
View
B+
Retailer 4
-
£442 GBP
A$912 AUD
View
B
Retailer 5
-
£852 GBP
View
Most Expensive
B
Do Amore Diamonds
27-5F4D4275D · Nov 2
£1,274 GBP
$1,710 USD
View
5 more retailers have this diamond
Prices start from £217 GBPSave up to £1,057 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 Cushion
£217 GBP