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Cushion|Lab Grown|IGI

4.05ct E FL Cushion Lab Grown Diamond

EX • E/FL • IGI LG797604470

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG797604470

Diamond specifications and retailer prices

From £4,082 GBP
$5,470 USD
As of October 30, 2026
Save £8,395 GBP (67%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £12,477 GBP at Riddles Jewelry · As of October 29, 2026
View at Riddles Jewelry

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 LG797604470 or 797604470. Listed at 8 retailers as of October 29, 2026, with prices from £4,082 to £12,477, a £8,395 spread on the same certified stone. Riddles Jewelry lists it at £12,477. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG797604470
Dimensions11.34 × 8.35 × 5.56 mm
L/W Ratio1.36
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.34 mm8.35 mm4.05 ctE / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG797604470
Side View
Table 62.0%Crown 35.2°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 66.6%

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: £4,074 GBP|Low: £3,200 GBP|High: £23,021 GBP|Avg: £8,846 GBP|-16.9%
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
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Retailer 16
Riddles Jewelry
October 18, 2026
Retailer 1£4,074 GBP
Retailer 11£4,082 GBP
Retailer 10£4,339 GBP
Retailer 14£4,491 GBP
Retailer 8£4,519 GBP
Retailer 16£4,903 GBP
Retailer 15£5,912 GBP
Retailer 2£6,119 GBP
Retailer 3£7,053 GBP
Retailer 9£7,836 GBP
Retailer 6£9,770 GBP
Retailer 13£11,304 GBP
Retailer 12£11,930 GBP
Riddles Jewelry£12,477 GBP
Retailer 5£12,909 GBP
Retailer 7£16,501 GBP
Retailer 4£23,021 GBP

9 data points across 17 retailers

8 retailers£4,082 GBP to £12,477 GBP

Retailer 1
-
£4,074 GBP
$5,459 USD
Price last confirmed 9 days ago
A
Retailer 2
-
£4,082 GBP
$5,470 USD
View
A
Retailer 3
-
£4,339 GBP
CA$8,075 CAD
View
A
Retailer 4
-
£4,491 GBP
$6,018 USD
View
Final sale: no returns
B+
Retailer 5
-
£7,836 GBP
$10,500 USD
View
B
Retailer 6
-
£11,304 GBP
$15,146 USD
View
B
Retailer 7
-
£11,930 GBP
$15,985 USD
View
Most Expensive
B
Riddles Jewelry
1976264165 · Oct 29
£12,477 GBP
$16,718 USD
View
7 more retailers have this diamond
Prices start from £4,082 GBPSave up to £8,395 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
£4,082 GBP