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Cushion|Lab Grown|IGI

4.09ct F VS1 Cushion Lab Grown Diamond

ID • F/VS1 • IGI LG837637820

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG837637820

Diamond specifications and retailer prices

From £1,091 GBP
$1,462 USD
As of November 1, 2026
Save £4,894 GBP (82%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £5,986 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 4.09ct lab-grown cushion diamond

This 4.09ct lab-grown cushion sits in the three to five carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG837637820 or 837637820. Listed at 14 retailers as of October 30, 2026, with prices from £1,091 to £5,986, a £4,894 spread on the same certified stone. Brilliant Earth lists it at £5,986. 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

4.09
Carat
F
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG837637820
Dimensions11.13 × 8.53 × 5.50 mm
L/W Ratio1.30
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.13 mm8.53 mm4.09 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG837637820
Side View
Table 49.0%Crown 36.5°Girdle: STK-THKPavilion 40.1°Culet: LargeDepth 64.5%

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: £5,986 GBP|Low: £1,091 GBP|High: £5,986 GBP|Avg: £2,247 GBP
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
Retailer 14
November 2, 2026
Retailer 14£1,091 GBP
Retailer 13£1,258 GBP
Retailer 4£1,309 GBP
Retailer 6£1,378 GBP
Retailer 7£1,594 GBP
Retailer 2£1,789 GBP
Retailer 9£1,802 GBP
Retailer 10£2,406 GBP
Retailer 11£2,426 GBP
Retailer 8£3,244 GBP
Retailer 12£3,361 GBP
Retailer 3£3,785 GBP
Retailer 5£3,970 GBP
Brilliant Earth£5,986 GBP

31 data points across 14 retailers

14 retailers£1,091 GBP to £5,986 GBP

A
Cheapest Retailer
-
£1,091 GBP
$1,462 USD
Final sale: no returns
A
Retailer 2
-
£1,258 GBP
$1,685 USD
View
B+
Retailer 3
-
£1,309 GBP
HK$13,700 HKD
View
B+
Retailer 4
-
£1,378 GBP
$1,846 USD
View
B+
Retailer 5
-
£1,594 GBP
View
B+
Retailer 6
-
£1,789 GBP
$2,397 USD
View
B+
Retailer 7
-
£1,802 GBP
€2,300 EUR
View
B
Retailer 8
-
£2,406 GBP
ZAR 52,087 ZAR
View
Retailer 9
-
£2,426 GBP
A$5,001 AUD
View
Price last confirmed 11 days ago
B
Retailer 10
-
£3,244 GBP
$4,347 USD
View
B
Retailer 11
-
£3,361 GBP
$4,503 USD
View
B
Retailer 12
-
£3,785 GBP
SGD 6,853 SGD
View
B
Retailer 13
-
£3,970 GBP
$5,319 USD
View
Most Expensive
B
Brilliant Earth
22337186A · Oct 30
£5,986 GBP
$8,020 USD
View
13 more retailers have this diamond
Prices start from £1,091 GBPSave up to £4,894 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
4.09ct Cushion
£1,091 GBP