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Cushion|Lab Grown|IGI

1.21ct F VS1 Cushion Lab Grown Diamond

ID • F/VS1 • IGI LG801634581

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

Certificate IGI LG801634581

Diamond specifications and retailer prices

From £166 GBP
$223 USD
As of October 25, 2026
Save £615 GBP (79%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £781 GBP at MOH London · As of October 29, 2026
View at MOH London

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 LG801634581 or 801634581. Listed at 13 retailers as of October 25, 2026, with prices from £166 to £781, a £615 spread on the same certified stone. MOH London lists it at £781. 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 angle32.4°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG801634581
Dimensions6.20 × 6.13 × 4.14 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.20 mm6.13 mm1.21 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG801634581
Side View
Table 59.0%Crown 32.4°Girdle: THK-VTKPavilion 40.1°Culet: NoneDepth 67.5%

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: Oct 25
Current: £781 GBP|Low: £165 GBP|High: £786 GBP|Avg: £414 GBP|+3.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 4£166 GBP
Retailer 12£285 GBP
Retailer 2£290 GBP
Retailer 9£304 GBP
Retailer 5£313 GBP
Retailer 7£325 GBP
Retailer 6£446 GBP
Retailer 3£485 GBP
Retailer 11£488 GBP
Retailer 8£499 GBP
Retailer 10£595 GBP
MOH London£781 GBP

41 data points across 12 retailers

13 retailers£166 GBP to £781 GBP

A
Cheapest Retailer
-
£166 GBP
$223 USD
A
Retailer 2
-
£285 GBP
ZAR 6,184 ZAR
View
A
Retailer 3
-
£290 GBP
€370 EUR
View
A
Retailer 4
-
£304 GBP
$408 USD
View
A
Retailer 5
-
£313 GBP
View
A
Retailer 6
-
£325 GBP
$436 USD
View
B+
Retailer 7
-
£446 GBP
$599 USD
View
B+
Retailer 8
-
£485 GBP
A$1,001 AUD
View
B+
Retailer 9
-
£488 GBP
$655 USD
View
B+
Retailer 10
-
£499 GBP
$670 USD
View
B
Retailer 11
-
£595 GBP
$799 USD
View
Retailer 12
-
£656 GBP
$880 USD
View
Price last confirmed 31 days ago
Most Expensive
B
MOH London
LG801634581 · Oct 29
£781 GBP
View
12 more retailers have this diamond
Prices start from £166 GBPSave up to £615 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
£166 GBP