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Cushion|Lab Grown|IGI

4.20ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG805652143

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG805652143

Diamond specifications and retailer prices

From £1,547 GBP
As of October 30, 2026
Save £4,927 GBP (76%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £6,474 GBP at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 4.2ct lab-grown cushion diamond

This 4.2ct 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 LG805652143 or 805652143. Listed at 18 retailers as of October 30, 2026, with prices from £1,547 to £6,474, a £4,927 spread on the same certified stone. Taylor and Hart lists it at £6,474. 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

4.20
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.8°
Pavilion angle39.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG805652143
Dimensions11.28 × 7.92 × 5.69 mm
L/W Ratio1.42
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.28 mm7.92 mm4.20 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG805652143
Side View
Table 66.0%Crown 38.8°Girdle: MED-STKPavilion 39.3°Culet: NoneDepth 71.8%

Caratlytics Score

How it works →
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: £2,877 GBP|Low: £1,437 GBP|High: £6,815 GBP|Avg: £3,368 GBP|+0.5%
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
Retailer 15
Retailer 16
Taylor and Hart
October 31, 2026
Retailer 11£1,547 GBP
Retailer 2£1,787 GBP
Retailer 13£1,888 GBP
Retailer 14£2,029 GBP
Retailer 15£2,140 GBP
Retailer 9£2,549 GBP
Retailer 10£2,706 GBP
Retailer 1£2,877 GBP
Retailer 7£3,044 GBP
Retailer 4£3,515 GBP
Retailer 8£3,703 GBP
Retailer 12£3,942 GBP
Retailer 16£4,340 GBP
Retailer 5£4,989 GBP
Retailer 6£5,299 GBP
Retailer 3£6,194 GBP
Taylor and Hart£6,474 GBP

21 data points across 17 retailers

18 retailers£1,547 GBP to £6,474 GBP

A
Cheapest Retailer
-
£1,547 GBP
A
Retailer 2
-
£1,787 GBP
$2,395 USD
View
Final sale: no returns
Retailer 3
-
£1,802 GBP
$2,415 USD
View
Price last confirmed 21 days ago
A
Retailer 4
-
£1,888 GBP
$2,530 USD
View
A
Retailer 5
-
£2,029 GBP
$2,719 USD
View
A
Retailer 6
-
£2,140 GBP
HK$22,400 HKD
View
A
Retailer 7
-
£2,549 GBP
View
A
Retailer 8
-
£2,706 GBP
$3,626 USD
View
A
Retailer 9
-
£2,877 GBP
€3,671 EUR
View
A
Retailer 10
-
£3,044 GBP
$4,079 USD
View
A
Retailer 11
-
£3,515 GBP
View
Retailer 12
-
£3,703 GBP
A$7,633 AUD
View
Price last confirmed 9 days ago
A
Retailer 13
-
£3,942 GBP
ZAR 85,319 ZAR
View
A
Retailer 14
-
£4,340 GBP
$5,815 USD
View
A
Retailer 15
-
£4,989 GBP
$6,685 USD
View
A
Retailer 16
-
£5,299 GBP
View
B+
Retailer 17
-
£6,194 GBP
SGD 11,216 SGD
View
Most Expensive
B+
Taylor and Hart
AP5JNQW · Oct 31
£6,474 GBP
$8,675 USD
View
17 more retailers have this diamond
Prices start from £1,547 GBPSave up to £4,927 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
4.20ct Cushion
£1,547 GBP