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Cushion|Lab Grown|IGI

1.21ct D VS1 Cushion Lab Grown Diamond

EX • D/VS1 • IGI LG816675728

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG816675728

Diamond specifications and retailer prices

From £231 GBP
$310 USD
As of November 1, 2026
Save £578 GBP (71%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £809 GBP at MOH London · As of November 1, 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 D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG816675728 or 816675728. Listed at 8 retailers as of November 1, 2026, with prices from £231 to £809, a £578 spread on the same certified stone. MOH London lists it at £809. 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 angle36.3°
Pavilion angle35.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816675728
Dimensions7.54 × 5.47 × 3.61 mm
L/W Ratio1.38
Girdle conditionFaceted
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
7.54 mm5.47 mm1.21 ctD / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816675728
Side View
Table 64.0%Crown 36.3°Girdle: MED-THKPavilion 35.4°Culet: NoneDepth 66.0%

Caratlytics Score

How it works →
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: £809 GBP|Low: £91 GBP|High: £820 GBP|Avg: £332 GBP|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 7£91 GBP
Retailer 6£231 GBP
Retailer 3£299 GBP
Retailer 2£311 GBP
Retailer 5£357 GBP
Retailer 4£409 GBP
MOH London£809 GBP

43 data points across 7 retailers

8 retailers£231 GBP to £809 GBP

B+
Cheapest Retailer
-
£231 GBP
$310 USD
A
Retailer 2
-
£299 GBP
ZAR 6,472 ZAR
View
A
Retailer 3
-
£311 GBP
View
A
Retailer 4
-
£344 GBP
$461 USD
View
A
Retailer 5
-
£357 GBP
$478 USD
View
B+
Retailer 6
-
£409 GBP
$548 USD
View
B
Retailer 7
-
£597 GBP
$800 USD
View
Most Expensive
B
MOH London
LG816675728 · Nov 1
£809 GBP
View
7 more retailers have this diamond
Prices start from £231 GBPSave up to £578 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
£231 GBP