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Cushion|Lab Grown|IGI

4.23ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG784645333

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG784645333

Diamond specifications and retailer prices

From £3,092 GBP
$4,118 USD
As of October 29, 2026
Save £16,086 GBP (84%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £19,179 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 LG784645333 or 784645333. Listed at 10 retailers as of October 29, 2026, with prices from £3,092 to £19,179, a £16,086 spread on the same certified stone. Do Amore Diamonds lists it at £19,179. 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 angle37.4°
Pavilion angle36.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG784645333
Dimensions11.05 × 8.49 × 5.69 mm
L/W Ratio1.30
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
11.05 mm8.49 mm4.23 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG784645333
Side View
Table 58.0%Crown 37.4°Girdle: STK-THKPavilion 36.8°Culet: NoneDepth 67.0%

Caratlytics Score

How it works →
A+
Exceptional
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: £19,179 GBP|Low: £3,092 GBP|High: £24,563 GBP|Avg: £9,382 GBP|-21.9%
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 8£3,092 GBP
Retailer 5£3,349 GBP
Retailer 2£3,520 GBP
Retailer 11£4,244 GBP
Retailer 7£5,045 GBP
Retailer 4£6,164 GBP
Retailer 9£6,285 GBP
Retailer 6£7,686 GBP
Retailer 10£16,686 GBP
Do Amore Diamonds£19,179 GBP
Retailer 3£20,465 GBP

26 data points across 11 retailers

10 retailers£3,092 GBP to £19,179 GBP

A+
Cheapest Retailer
-
£3,092 GBP
$4,118 USD
A
Retailer 2
-
£3,349 GBP
$4,460 USD
View
A
Retailer 3
-
£3,520 GBP
$4,687 USD
View
A
Retailer 4
-
£4,244 GBP
$5,652 USD
View
Final sale: no returns
A
Retailer 5
-
£5,045 GBP
$6,719 USD
View
A
Retailer 6
-
£6,164 GBP
€7,817 EUR
View
Retailer 7
-
£6,285 GBP
$8,370 USD
View
Price last confirmed 22 days ago
B+
Retailer 8
-
£7,686 GBP
View
B
Retailer 9
-
£16,686 GBP
$22,220 USD
View
Most Expensive
B
Do Amore Diamonds
27-5B800B57F · Oct 30
£19,179 GBP
$25,540 USD
View
9 more retailers have this diamond
Prices start from £3,092 GBPSave up to £16,086 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
£3,092 GBP