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Cushion|Lab Grown|IGI

4.18ct H VS1 Cushion Lab Grown Diamond

ID • H/VS1 • IGI LG522239005

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG522239005

Diamond specifications and retailer prices

From £2,985 GBP
$4,000 USD
As of October 31, 2026
10 retailers carry this diamond
Most expensive: £28,241 GBP at Cape Diamonds · As of October 29, 2026
View at Cape Diamonds

About this 4.18ct lab-grown cushion diamond

This 4.18ct lab-grown cushion sits in the three to five carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG522239005 or 522239005. Listed at 10 retailers as of October 31, 2026. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

4.18
Carat
H
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle33.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG522239005
Dimensions9.18 × 8.97 × 5.73 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
9.18 mm8.97 mm4.18 ctH / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG522239005
Side View
Table 64.0%Crown 34.8°Girdle: THK-VTKPavilion 33.1°Culet: NoneDepth 63.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £28,241 GBP|Low: £2,985 GBP|High: £33,075 GBP|Avg: £17,576 GBP|-10.8%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 7£2,985 GBP
Retailer 12£12,132 GBP
Retailer 9£12,809 GBP
Retailer 3£12,826 GBP
Retailer 8£13,127 GBP
Retailer 6£13,267 GBP
Retailer 4£14,243 GBP
Retailer 10£19,006 GBP
Retailer 5£20,839 GBP
Cape Diamonds£28,241 GBP
Retailer 2£28,811 GBP
Retailer 11£33,075 GBP

20 data points across 12 retailers

10 retailers

B
Cheapest Retailer
-
£2,985 GBP
$4,000 USD
Retailer 2
-
£12,132 GBP
$16,255 USD
View
Price under review
Retailer 3
-
£12,809 GBP
$17,163 USD
View
Price under review
Final sale: no returns
Retailer 4
-
£20,839 GBP
View
Price under review
Most Expensive
Cape Diamonds
cert_522239005 · Oct 29
£28,241 GBP
ZAR 611,297 ZAR
View
Price under review
4 more retailers have this diamond
Prices start from £2,985 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.

B
4.18ct Cushion
£2,985 GBP