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Cushion|Lab Grown|IGI

4.05ct E IF Cushion Lab Grown Diamond

EX • E/IF • IGI LG771607368

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG771607368

Diamond specifications and retailer prices

From £3,267 GBP
As of October 30, 2026
Save £10,701 GBP (77%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £13,967 GBP at Taylor and Hart · As of October 30, 2026
View at Taylor and Hart

About this 4.05ct lab-grown cushion diamond

This 4.05ct lab-grown cushion sits in the three to five carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG771607368 or 771607368. Listed at 16 retailers as of October 30, 2026, with prices from £3,267 to £13,967, a £10,701 spread on the same certified stone. Taylor and Hart lists it at £13,967. 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

4.05
Carat
E
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle37.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG771607368
Dimensions10.67 × 8.17 × 5.52 mm
L/W Ratio1.31
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.67 mm8.17 mm4.05 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG771607368
Side View
Table 63.0%Crown 33.9°Girdle: STK-THKPavilion 37.6°Culet: NoneDepth 67.6%

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: Oct 30
Current: £6,253 GBP|Low: £3,256 GBP|High: £13,444 GBP|Avg: £6,988 GBP|+2.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 4£3,267 GBP
Retailer 3£3,732 GBP
Retailer 9£3,910 GBP
Retailer 5£5,076 GBP
Retailer 10£6,048 GBP
Retailer 1£6,253 GBP
Retailer 7£8,139 GBP
Retailer 6£8,322 GBP
Retailer 8£8,566 GBP
Retailer 11£9,845 GBP
Retailer 2£13,444 GBP

40 data points across 11 retailers

16 retailers£3,267 GBP to £13,967 GBP

A
Cheapest Retailer
-
£3,267 GBP
A
Retailer 2
-
£3,732 GBP
$5,001 USD
View
A
Retailer 3
-
£3,775 GBP
$5,058 USD
View
Final sale: no returns
Retailer 4
-
£3,910 GBP
$5,239 USD
View
Price last confirmed 15 days ago
A
Retailer 5
-
£3,941 GBP
$5,280 USD
View
A
Retailer 6
-
£4,679 GBP
$6,269 USD
View
A
Retailer 7
-
£5,076 GBP
View
A
Retailer 8
-
£5,516 GBP
View
B+
Retailer 9
-
£6,048 GBP
$8,104 USD
View
B+
Retailer 10
-
£6,253 GBP
€7,979 EUR
View
B+
Retailer 11
-
£8,139 GBP
View
B+
Retailer 12
-
£8,322 GBP
ZAR 180,133 ZAR
View
Retailer 13
-
£8,566 GBP
A$17,658 AUD
View
Price last confirmed 9 days ago
B+
Retailer 14
-
£9,845 GBP
$13,191 USD
View
B
Retailer 15
-
£13,444 GBP
SGD 24,342 SGD
View
Most Expensive
B
Taylor and Hart
R8JQKCD · Oct 30
£13,967 GBP
$18,715 USD
View
15 more retailers have this diamond
Prices start from £3,267 GBPSave up to £10,701 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
4.05ct Cushion
£3,267 GBP