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Cushion|Lab Grown|IGI

1.21ct F VS1 Cushion Lab Grown Diamond

ID • F/VS1 • IGI LG749577139

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG749577139

Diamond specifications and retailer prices

From £333 GBP
$447 USD
As of November 1, 2026
Save £705 GBP (68%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,038 GBP at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

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 LG749577139 or 749577139. Listed at 11 retailers as of October 31, 2026, with prices from £333 to £1,038, a £705 spread on the same certified stone. Taylor and Hart lists it at £1,038. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle38.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG749577139
Dimensions6.43 × 6.14 × 3.91 mm
L/W Ratio1.05
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.43 mm6.14 mm1.21 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG749577139
Side View
Table 63.0%Crown 35.5°Girdle: STK-THKPavilion 38.1°Culet: NoneDepth 63.7%

Caratlytics Score

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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 1
Current: £493 GBP|Low: £326 GBP|High: £1,038 GBP|Avg: £575 GBP|+2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Taylor and Hart
November 2, 2026
Retailer 9£333 GBP
Retailer 7£344 GBP
Retailer 3£348 GBP
Retailer 4£365 GBP
Retailer 2£374 GBP
Retailer 1£493 GBP
Retailer 6£663 GBP
Retailer 8£806 GBP
Retailer 5£812 GBP
Taylor and Hart£1,038 GBP

42 data points across 10 retailers

11 retailers£333 GBP to £1,038 GBP

A
Cheapest Retailer
-
£333 GBP
$447 USD
A
Retailer 2
-
£344 GBP
$462 USD
View
A
Retailer 3
-
£348 GBP
ZAR 7,539 ZAR
View
A
Retailer 4
-
£365 GBP
€466 EUR
View
A
Retailer 5
-
£374 GBP
View
B+
Retailer 6
-
£493 GBP
A$1,017 AUD
View
Retailer 7
-
£514 GBP
$690 USD
View
Retailer 8
-
£663 GBP
$890 USD
View
Price last confirmed 25 days ago
B
Retailer 9
-
£806 GBP
SGD 1,461 SGD
View
B
Retailer 10
-
£812 GBP
View
Most Expensive
B
Taylor and Hart
B9Y3OZB · Oct 31
£1,038 GBP
$1,393 USD
View
10 more retailers have this diamond
Prices start from £333 GBPSave up to £705 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
£333 GBP