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Cushion|Lab Grown|IGI

4.20ct H VS1 Cushion Lab Grown Diamond

GD • H/VS1 • IGI LG589377999

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG589377999

Diamond specifications and retailer prices

From £2,575 GBP
$3,450 USD
As of October 31, 2026
1 retailer carries this diamond
Only listing: £2,575 GBP at Brilliant Earth
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Brilliant Earth

About this 4.2ct lab-grown cushion diamond

This 4.2ct lab-grown cushion sits in the three to five carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a standard cut grade and certified by IGI LG589377999 or 589377999. Listed at a single retailer as of October 31, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

4.20
Carat
H
Colour
VS1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle28.7°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG589377999
Dimensions11.09 × 8.75 × 5.76 mm
L/W Ratio1.27
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
11.09 mm8.75 mm4.20 ctH / VS1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG589377999
Side View
Table 63.0%Crown 28.7°Girdle: MED-THKPavilion 39.8°Culet: NoneDepth 65.8%

Caratlytics Score

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

Price History

Last verified: Oct 31
Current: £2,575 GBP|Low: £544 GBP|High: £5,694 GBP|Avg: £2,069 GBP|-24.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
May 4, 2026
Retailer 8£556 GBP
Retailer 5£821 GBP
Retailer 4£1,023 GBP
Retailer 7£1,313 GBP
Retailer 6£1,792 GBP
Retailer 9£1,865 GBP
Retailer 2£1,963 GBP
Retailer 3£2,145 GBP
Brilliant Earth£2,575 GBP

36 data points across 9 retailers

1 retailer

B
Brilliant Earth
7677397A · Oct 31
£2,575 GBP
$3,450 USD
View

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
4.20ct Cushion
£2,575 GBP