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Cushion|Lab Grown|IGI

1.21ct D VS1 Cushion Lab Grown Diamond

EX • D/VS1 • IGI LG845659404

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG845659404

Diamond specifications and retailer prices

From £158 GBP
$212 USD
As of November 1, 2026
Save £382 GBP (71%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £540 GBP at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 1.21ct lab-grown cushion diamond

This 1.21ct lab-grown cushion sits in the classic one-carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG845659404 or 845659404. Listed at 3 retailers as of October 28, 2026, with prices from £158 to £540, a £382 spread on the same certified stone. Rare Carat lists it at £540. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
D
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle36°
OriginLab Grown
Grading LabIGI
CertificateIGI LG845659404
Dimensions7.34 × 5.55 × 3.75 mm
L/W Ratio1.32
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.34 mm5.55 mm1.21 ctD / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG845659404
Side View
Table 63.0%Crown 35.4°Girdle: MED-STKPavilion 36°Culet: NoneDepth 67.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: £333 GBP|Low: £158 GBP|High: £347 GBP|Avg: £268 GBP|-4.0%
Retailer 1
Retailer 2
November 2, 2026
Retailer 2£158 GBP
Retailer 1£333 GBP

16 data points across 2 retailers

3 retailers£158 GBP to £540 GBP

A
Cheapest Retailer
-
£158 GBP
$212 USD
Final sale: no returns
A
Retailer 2
-
£333 GBP
View
Most Expensive
B+
Rare Carat
845659404 · Oct 28
£540 GBP
$725 USD
View
2 more retailers have this diamond
Prices start from £158 GBPSave up to £382 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
£158 GBP