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Cushion|Lab Grown|IGI

4.09ct F VS1 Cushion Lab Grown Diamond

VG • F/VS1 • IGI LG849659608

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG849659608

Diamond specifications and retailer prices

From £451 GBP
As of November 1, 2026
Save £5,117 GBP (92%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £5,568 GBP at Brilliant Earth · As of October 31, 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 very-good cut grade and certified by IGI LG849659608 or 849659608. Listed at 17 retailers as of October 31, 2026, with prices from £451 to £5,568, a £5,117 spread on the same certified stone. Brilliant Earth lists it at £5,568. 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

4.09
Carat
F
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG849659608
Dimensions9.54 × 9.19 × 5.84 mm
L/W Ratio1.04
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.54 mm9.19 mm4.09 ctF / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG849659608
Side View
Table 68.0%Crown 35.3°Girdle: MED-THKPavilion 40.6°Culet: NoneDepth 63.5%

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: £844 GBP|Low: £451 GBP|High: £2,357 GBP|Avg: £1,300 GBP|+0.6%
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
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Retailer 16
November 2, 2026
Retailer 10£451 GBP
Retailer 15£638 GBP
Retailer 7£724 GBP
Retailer 16£775 GBP
Retailer 11£810 GBP
Retailer 1£844 GBP
Retailer 3£1,075 GBP
Retailer 14£1,082 GBP
Retailer 13£1,145 GBP
Retailer 5£1,197 GBP
Retailer 4£1,636 GBP
Retailer 2£1,705 GBP
Retailer 8£1,749 GBP
Retailer 12£2,241 GBP
Retailer 6£2,258 GBP
Retailer 9£2,345 GBP

7 data points across 16 retailers

17 retailers£451 GBP to £5,568 GBP

A
Cheapest Retailer
-
£451 GBP
A
Retailer 2
-
£638 GBP
$855 USD
View
B+
Retailer 3
-
£724 GBP
$970 USD
View
A
Retailer 4
-
£775 GBP
$1,039 USD
View
A
Retailer 5
-
£810 GBP
€1,033 EUR
View
A
Retailer 6
-
£844 GBP
View
A
Retailer 7
-
£1,075 GBP
ZAR 23,277 ZAR
View
A
Retailer 8
-
£1,082 GBP
A$2,231 AUD
View
B+
Retailer 9
-
£1,145 GBP
$1,534 USD
View
B+
Retailer 10
-
£1,197 GBP
$1,604 USD
View
B+
Retailer 11
-
£1,636 GBP
$2,192 USD
View
B+
Retailer 12
-
£1,705 GBP
SGD 3,088 SGD
View
B+
Retailer 13
-
£1,749 GBP
$2,343 USD
View
B
Retailer 14
-
£2,241 GBP
A$4,620 AUD
View
B
Retailer 15
-
£2,258 GBP
$3,025 USD
View
B
Retailer 16
-
£2,345 GBP
View
Most Expensive
B
Brilliant Earth
22402208A · Oct 31
£5,568 GBP
$7,460 USD
View
16 more retailers have this diamond
Prices start from £451 GBPSave up to £5,117 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
£451 GBP