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Cushion|Lab Grown|IGI

1.21ct D VS1 Cushion Lab Grown Diamond

EX • D/VS1 • IGI LG833675241

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG833675241

Diamond specifications and retailer prices

From £155 GBP
$208 USD
As of November 1, 2026
Save £489 GBP (76%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £644 GBP at Frank Darling · As of November 2, 2026
View at Frank Darling

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 LG833675241 or 833675241. Listed at 4 retailers as of November 1, 2026, with prices from £155 to £644, a £489 spread on the same certified stone. Frank Darling lists it at £644. 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 angle37°
Pavilion angle36.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG833675241
Dimensions7.13 × 5.55 × 3.79 mm
L/W Ratio1.28
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.13 mm5.55 mm1.21 ctD / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG833675241
Side View
Table 62.0%Crown 37°Girdle: MED-THKPavilion 36.5°Culet: NoneDepth 68.3%

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: £644 GBP|Low: £145 GBP|High: £665 GBP|Avg: £372 GBP|-3.2%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 28, 2026
Retailer 3£155 GBP
Retailer 4£239 GBP
Retailer 6£340 GBP
Retailer 5£345 GBP
Retailer 2£537 GBP
Frank Darling£644 GBP

9 data points across 6 retailers

4 retailers£155 GBP to £644 GBP

A
Cheapest Retailer
-
£155 GBP
$208 USD
Final sale: no returns
B+
Retailer 2
-
£239 GBP
$321 USD
View
B+
Retailer 3
-
£537 GBP
$720 USD
View
Most Expensive
B
Frank Darling
100196791881KD · Nov 2
£644 GBP
$864 USD
View
3 more retailers have this diamond
Prices start from £155 GBPSave up to £489 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
£155 GBP