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Cushion|Lab Grown|IGI

1.21ct D VS1 Cushion Lab Grown Diamond

ID • D/VS1 • IGI LG850690159

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

Certificate IGI LG850690159

Diamond specifications and retailer prices

From £191 GBP
HK$2,000 HKD
As of November 1, 2026
Save £389 GBP (67%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £580 GBP at Taylor and Hart · As of November 1, 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 D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG850690159 or 850690159. Listed at 7 retailers as of November 1, 2026, with prices from £191 to £580, a £389 spread on the same certified stone. Taylor and Hart lists it at £580. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG850690159
Dimensions6.18 × 6.15 × 4.17 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.18 mm6.15 mm1.21 ctD / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG850690159
Side View
Table 65.0%Crown 35.3°Girdle: STK-THKPavilion 41°Culet: NoneDepth 67.8%

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: £288 GBP|Low: £191 GBP|High: £580 GBP|Avg: £397 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Taylor and Hart
November 2, 2026
Retailer 4£191 GBP
Retailer 1£288 GBP
Retailer 5£296 GBP
Retailer 3£300 GBP
Retailer 2£342 GBP
Retailer 6£566 GBP
Taylor and Hart£580 GBP

3 data points across 7 retailers

7 retailers£191 GBP to £580 GBP

A
Cheapest Retailer
-
£191 GBP
HK$2,000 HKD
A
Retailer 2
-
£288 GBP
€368 EUR
View
A
Retailer 3
-
£296 GBP
$397 USD
View
A
Retailer 4
-
£300 GBP
View
A
Retailer 5
-
£342 GBP
$459 USD
View
B+
Retailer 6
-
£566 GBP
$759 USD
View
Most Expensive
B
Taylor and Hart
BGVXULR · Nov 1
£580 GBP
$779 USD
View
6 more retailers have this diamond
Prices start from £191 GBPSave up to £389 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
£191 GBP