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Cushion|Lab Grown|IGI

4.23ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG784644157

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG784644157

Diamond specifications and retailer prices

From £3,073 GBP
$4,118 USD
As of October 29, 2026
Save £15,368 GBP (83%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £18,442 GBP at Do Amore Diamonds · As of October 30, 2026
View at Do Amore Diamonds

About this 4.23ct lab-grown cushion diamond

This 4.23ct 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 LG784644157 or 784644157. Listed at 11 retailers as of October 29, 2026, with prices from £3,073 to £18,442, a £15,368 spread on the same certified stone. Do Amore Diamonds lists it at £18,442. 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

4.23
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle36.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG784644157
Dimensions10.42 × 8.68 × 5.82 mm
L/W Ratio1.20
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 mm8.68 mm4.23 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG784644157
Side View
Table 60.0%Crown 33.6°Girdle: THK-VTKPavilion 36.2°Culet: NoneDepth 67.1%

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: £18,442 GBP|Low: £3,073 GBP|High: £24,412 GBP|Avg: £8,323 GBP|-24.5%
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 10£3,073 GBP
Retailer 6£3,105 GBP
Retailer 4£3,474 GBP
Retailer 3£4,218 GBP
Retailer 9£5,015 GBP
Retailer 5£5,913 GBP
Retailer 11£6,247 GBP
Retailer 7£7,392 GBP
Retailer 8£8,529 GBP
Retailer 2£9,784 GBP
Do Amore Diamonds£18,442 GBP

28 data points across 11 retailers

11 retailers£3,073 GBP to £18,442 GBP

A
Cheapest Retailer
-
£3,073 GBP
$4,118 USD
A
Retailer 2
-
£3,105 GBP
$4,160 USD
View
A
Retailer 3
-
£3,474 GBP
$4,655 USD
View
A
Retailer 4
-
£4,218 GBP
$5,652 USD
View
Final sale: no returns
A
Retailer 5
-
£5,015 GBP
$6,719 USD
View
A
Retailer 6
-
£5,913 GBP
€7,546 EUR
View
Retailer 7
-
£6,247 GBP
$8,370 USD
View
Price last confirmed 22 days ago
B+
Retailer 8
-
£7,392 GBP
View
B+
Retailer 9
-
£8,529 GBP
$11,428 USD
View
B+
Retailer 10
-
£9,784 GBP
$13,110 USD
View
Most Expensive
B
Do Amore Diamonds
27-9912B3267 · Oct 30
£18,442 GBP
$24,710 USD
View
10 more retailers have this diamond
Prices start from £3,073 GBPSave up to £15,368 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
4.23ct Cushion
£3,073 GBP