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Cushion|Lab Grown|IGI

4.06ct H VS1 Cushion Lab Grown Diamond

ID • H/VS1 • IGI LG499125835

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG499125835

Diamond specifications and retailer prices

From £715 GBP
$958 USD
As of October 31, 2026
Save £3,255 GBP (82%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £3,970 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 4.06ct lab-grown cushion diamond

This 4.06ct 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 LG499125835 or 499125835. Listed at 14 retailers as of October 31, 2026, with prices from £715 to £3,970, a £3,255 spread on the same certified stone. Brilliant Earth lists it at £3,970. 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

4.06
Carat
H
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle31.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG499125835
Dimensions9.29 × 8.87 × 5.65 mm
L/W Ratio1.05
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
9.29 mm8.87 mm4.06 ctH / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG499125835
Side View
Table 63.5%Crown 35.5°Girdle: STK-VTKPavilion 31.6°Culet: NoneDepth 63.7%

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: Oct 31
Current: £3,970 GBP|Low: £650 GBP|High: £4,090 GBP|Avg: £1,737 GBP|-2.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 31, 2026
Retailer 3£715 GBP
Retailer 10£741 GBP
Retailer 6£873 GBP
Retailer 13£990 GBP
Retailer 11£1,022 GBP
Retailer 9£1,192 GBP
Retailer 7£1,578 GBP
Retailer 2£1,588 GBP
Retailer 12£2,047 GBP
Retailer 4£2,340 GBP
Retailer 5£2,570 GBP
Retailer 8£2,793 GBP
Brilliant Earth£3,970 GBP

25 data points across 13 retailers

14 retailers£715 GBP to £3,970 GBP

A
Cheapest Retailer
-
£715 GBP
$958 USD
Final sale: no returns
Retailer 2
-
£741 GBP
$993 USD
View
Price last confirmed 15 days ago
A
Retailer 3
-
£873 GBP
$1,170 USD
View
A
Retailer 4
-
£990 GBP
$1,326 USD
View
A
Retailer 5
-
£1,022 GBP
$1,370 USD
View
A
Retailer 6
-
£1,192 GBP
$1,597 USD
View
A
Retailer 7
-
£1,578 GBP
ZAR 34,150 ZAR
View
B+
Retailer 8
-
£1,588 GBP
A$3,274 AUD
View
B+
Retailer 9
-
£2,047 GBP
View
B
Retailer 10
-
£2,340 GBP
$3,135 USD
View
B
Retailer 11
-
£2,474 GBP
HK$25,900 HKD
View
B
Retailer 12
-
£2,570 GBP
$3,444 USD
View
B
Retailer 13
-
£2,793 GBP
View
Most Expensive
B
Brilliant Earth
17972198A · Oct 31
£3,970 GBP
$5,320 USD
View
13 more retailers have this diamond
Prices start from £715 GBPSave up to £3,255 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
4.06ct Cushion
£715 GBP