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Cushion|Lab Grown|IGI

4.22ct D FL Cushion Lab Grown Diamond

EX • D/FL • IGI LG784644349

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG784644349

Diamond specifications and retailer prices

From £3,067 GBP
$4,109 USD
As of October 29, 2026
Save £15,338 GBP (83%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £18,404 GBP at Do Amore Diamonds · As of October 30, 2026
View at Do Amore Diamonds

About this 4.22ct lab-grown cushion diamond

This 4.22ct lab-grown cushion sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG784644349 or 784644349. Listed at 12 retailers as of October 29, 2026, with prices from £3,067 to £18,404, a £15,338 spread on the same certified stone. Do Amore Diamonds lists it at £18,404. 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

4.22
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.7°
Pavilion angle38.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG784644349
Dimensions6.32 × 9.27 × 9.25 mm
L/W Ratio1.47
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
6.32 mm9.27 mm4.22 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG784644349
Side View
Table 59.0%Crown 37.7°Girdle: STK-THKPavilion 38.8°Culet: NoneDepth 68.3%

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 29
Current: £18,404 GBP|Low: £3,067 GBP|High: £24,360 GBP|Avg: £8,220 GBP|-24.4%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 9£3,067 GBP
Retailer 5£3,097 GBP
Retailer 2£3,460 GBP
Retailer 3£4,208 GBP
Retailer 8£5,003 GBP
Retailer 4£5,899 GBP
Retailer 10£6,236 GBP
Retailer 6£7,375 GBP
Retailer 7£8,509 GBP
Retailer 11£16,539 GBP
Do Amore Diamonds£18,404 GBP

28 data points across 11 retailers

12 retailers£3,067 GBP to £18,404 GBP

A
Cheapest Retailer
-
£3,067 GBP
$4,109 USD
A
Retailer 2
-
£3,097 GBP
$4,150 USD
View
A
Retailer 3
-
£3,460 GBP
$4,636 USD
View
A
Retailer 4
-
£4,208 GBP
$5,638 USD
View
Final sale: no returns
A
Retailer 5
-
£5,003 GBP
$6,704 USD
View
A
Retailer 6
-
£5,899 GBP
€7,528 EUR
View
Retailer 7
-
£6,236 GBP
$8,355 USD
View
Price last confirmed 23 days ago
B+
Retailer 8
-
£7,375 GBP
View
B+
Retailer 9
-
£8,509 GBP
$11,401 USD
View
B
Retailer 10
-
£14,980 GBP
$20,071 USD
View
B
Retailer 11
-
£16,539 GBP
$22,160 USD
View
Most Expensive
B
Do Amore Diamonds
27-F06BDCF82 · Oct 30
£18,404 GBP
$24,660 USD
View
11 more retailers have this diamond
Prices start from £3,067 GBPSave up to £15,338 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
4.22ct Cushion
£3,067 GBP