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Cushion|Lab Grown|IGI

4.05ct E FL Cushion Lab Grown Diamond

ID • E/FL • IGI LG804659510

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG804659510

Diamond specifications and retailer prices

From £3,300 GBP
$4,422 USD
As of October 30, 2026
Save £10,449 GBP (76%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £13,749 GBP at With Clarity · As of October 31, 2026
View at With Clarity

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 LG804659510 or 804659510. Listed at 14 retailers as of October 30, 2026, with prices from £3,300 to £13,749, a £10,449 spread on the same certified stone. With Clarity lists it at £13,749. 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 angle36.3°
Pavilion angle34.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG804659510
Dimensions10.68 × 8.66 × 5.51 mm
L/W Ratio1.23
Girdle conditionFaceted
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
10.68 mm8.66 mm4.05 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG804659510
Side View
Table 62.0%Crown 36.3°Girdle: MED-STKPavilion 34.4°Culet: NoneDepth 63.6%

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: £4,565 GBP|Low: £3,300 GBP|High: £16,695 GBP|Avg: £7,376 GBP|-18.8%
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
With Clarity
October 31, 2026
Retailer 11£3,300 GBP
Retailer 3£4,337 GBP
Retailer 13£4,550 GBP
Retailer 1£4,565 GBP
Retailer 2£5,327 GBP
Retailer 8£5,703 GBP
Retailer 10£5,847 GBP
Retailer 4£6,535 GBP
Retailer 7£7,397 GBP
Retailer 9£7,484 GBP
Retailer 6£8,277 GBP
Retailer 12£9,310 GBP
Retailer 5£12,334 GBP
With Clarity£13,749 GBP

42 data points across 14 retailers

14 retailers£3,300 GBP to £13,749 GBP

A
Cheapest Retailer
-
£3,300 GBP
$4,422 USD
A
Retailer 2
-
£4,337 GBP
HK$45,400 HKD
View
A
Retailer 3
-
£4,550 GBP
$6,096 USD
View
A
Retailer 4
-
£4,565 GBP
View
A
Retailer 5
-
£5,327 GBP
$7,138 USD
View
A
Retailer 6
-
£5,703 GBP
€7,277 EUR
View
Retailer 7
-
£5,847 GBP
$7,835 USD
View
Price last confirmed 9 days ago
A
Retailer 8
-
£6,535 GBP
$8,756 USD
View
B+
Retailer 9
-
£7,397 GBP
ZAR 160,110 ZAR
View
B+
Retailer 10
-
£7,484 GBP
View
B+
Retailer 11
-
£8,277 GBP
$11,090 USD
View
B+
Retailer 12
-
£9,310 GBP
$12,474 USD
View
B+
Retailer 13
-
£12,334 GBP
$16,527 USD
View
Most Expensive
B
With Clarity
804659510 · Oct 31
£13,749 GBP
$18,422 USD
View
13 more retailers have this diamond
Prices start from £3,300 GBPSave up to £10,449 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
£3,300 GBP