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Cushion|Lab Grown|IGI

1.21ct D VS1 Cushion Lab Grown Diamond

ID • D/VS1 • IGI LG658475150

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG658475150

Diamond specifications and retailer prices

From £183 GBP
$245 USD
As of November 1, 2026
Save £753 GBP (80%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £935 GBP at Reve Diamonds · As of November 1, 2026
View at Reve Diamonds

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 LG658475150 or 658475150. Listed at 14 retailers as of November 1, 2026, with prices from £183 to £935, a £753 spread on the same certified stone. Reve Diamonds lists it at £935. 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 angle34.6°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG658475150
Dimensions6.14 × 6.12 × 4.13 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.14 mm6.12 mm1.21 ctD / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG658475150
Side View
Table 62.0%Crown 34.6°Girdle: MED-STKPavilion 39.8°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: Nov 1
Current: £376 GBP|Low: £165 GBP|High: £961 GBP|Avg: £504 GBP|+16.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Reve Diamonds
November 2, 2026
Retailer 2£183 GBP
Retailer 14£272 GBP
Retailer 9£313 GBP
Retailer 5£346 GBP
Retailer 8£350 GBP
Retailer 3£352 GBP
Retailer 1£376 GBP
Retailer 15£439 GBP
Retailer 13£495 GBP
Retailer 12£540 GBP
Retailer 6£555 GBP
Retailer 7£670 GBP
Retailer 4£690 GBP
Retailer 10£797 GBP
Retailer 11£816 GBP
Reve Diamonds£935 GBP

37 data points across 16 retailers

14 retailers£183 GBP to £935 GBP

A
Cheapest Retailer
-
£183 GBP
$245 USD
Final sale: no returns
A
Retailer 2
-
£313 GBP
€400 EUR
View
A
Retailer 3
-
£346 GBP
$464 USD
View
A
Retailer 4
-
£350 GBP
ZAR 7,581 ZAR
View
A
Retailer 5
-
£352 GBP
$473 USD
View
B+
Retailer 6
-
£376 GBP
View
B+
Retailer 7
-
£439 GBP
$589 USD
View
B+
Retailer 8
-
£495 GBP
A$1,022 AUD
View
B+
Retailer 9
-
£540 GBP
$725 USD
View
B+
Retailer 10
-
£555 GBP
$745 USD
View
B
Retailer 11
-
£690 GBP
$927 USD
View
B
Retailer 12
-
£797 GBP
$1,070 USD
View
B
Retailer 13
-
£816 GBP
View
Most Expensive
B
Reve Diamonds
ACBB1653A · Nov 1
£935 GBP
$1,255 USD
View
13 more retailers have this diamond
Prices start from £183 GBPSave up to £753 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
£183 GBP