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Cushion|Lab Grown|IGI

4.05ct E FL Cushion Lab Grown Diamond

ID • E/FL • IGI LG784645772

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG784645772

Diamond specifications and retailer prices

From £2,649 GBP
$3,550 USD
As of October 30, 2026
Save £13,718 GBP (84%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £16,367 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG784645772 or 784645772. Listed at 10 retailers as of October 30, 2026, with prices from £2,649 to £16,367, a £13,718 spread on the same certified stone. Do Amore Diamonds lists it at £16,367. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle35.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG784645772
Dimensions10.42 × 8.40 × 5.73 mm
L/W Ratio1.24
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
10.42 mm8.40 mm4.05 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG784645772
Side View
Table 59.0%Crown 34.7°Girdle: MED-THKPavilion 35.7°Culet: NoneDepth 68.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £16,367 GBP|Low: £2,649 GBP|High: £20,763 GBP|Avg: £6,489 GBP|-21.2%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 2£2,649 GBP
Retailer 6£2,877 GBP
Retailer 4£3,403 GBP
Retailer 10£3,588 GBP
Retailer 8£4,317 GBP
Retailer 5£5,214 GBP
Retailer 9£5,792 GBP
Retailer 7£6,559 GBP
Retailer 3£7,986 GBP
Do Amore Diamonds£16,367 GBP

30 data points across 10 retailers

10 retailers£2,649 GBP to £16,367 GBP

A
Cheapest Retailer
-
£2,649 GBP
$3,550 USD
A
Retailer 2
-
£2,877 GBP
$3,855 USD
View
A
Retailer 3
-
£3,403 GBP
$4,559 USD
View
A
Retailer 4
-
£3,588 GBP
$4,808 USD
View
Final sale: no returns
A
Retailer 5
-
£4,317 GBP
$5,784 USD
View
A
Retailer 6
-
£5,214 GBP
€6,653 EUR
View
Retailer 7
-
£5,792 GBP
$7,760 USD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
£6,559 GBP
View
B+
Retailer 9
-
£7,986 GBP
$10,700 USD
View
Most Expensive
B
Do Amore Diamonds
27-D855F980A · Oct 31
£16,367 GBP
$21,930 USD
View
9 more retailers have this diamond
Prices start from £2,649 GBPSave up to £13,718 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
£2,649 GBP