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Cushion|Lab Grown|IGI

4.23ct D FL Cushion Lab Grown Diamond

EX • D/FL • IGI LG789612851

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG789612851

Diamond specifications and retailer prices

From £3,212 GBP
As of October 30, 2026
Save £17,446 GBP (84%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £20,658 GBP at Do Amore Diamonds · As of October 29, 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 LG789612851 or 789612851. Listed at 21 retailers as of October 29, 2026, with prices from £3,212 to £20,658, a £17,446 spread on the same certified stone. Do Amore Diamonds lists it at £20,658. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.2°
Pavilion angle37.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG789612851
Dimensions10.95 × 8.81 × 5.89 mm
L/W Ratio1.24
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
10.95 mm8.81 mm4.23 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG789612851
Side View
Table 59.0%Crown 32.2°Girdle: MED-STKPavilion 37.4°Culet: NoneDepth 66.9%

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: £20,658 GBP|Low: £3,201 GBP|High: £20,658 GBP|Avg: £8,009 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
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Retailer 8
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Retailer 11
Retailer 12
Retailer 13
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Retailer 19
October 30, 2026
Retailer 2£3,212 GBP
Retailer 16£3,314 GBP
Retailer 3£3,363 GBP
Retailer 17£3,465 GBP
Retailer 19£3,526 GBP
Retailer 8£3,846 GBP
Retailer 18£4,614 GBP
Retailer 12£4,987 GBP
Retailer 9£5,413 GBP
Retailer 7£5,949 GBP
Retailer 5£6,577 GBP
Retailer 14£7,225 GBP
Retailer 15£8,004 GBP
Retailer 13£8,183 GBP
Retailer 4£9,589 GBP
Retailer 6£13,360 GBP
Retailer 10£13,719 GBP
Retailer 11£16,686 GBP
Do Amore Diamonds£20,658 GBP

33 data points across 19 retailers

21 retailers£3,212 GBP to £20,658 GBP

A
Cheapest Retailer
-
£3,212 GBP
A
Retailer 2
-
£3,314 GBP
$4,413 USD
View
A
Retailer 3
-
£3,363 GBP
$4,479 USD
View
Final sale: no returns
A
Retailer 4
-
£3,465 GBP
$4,614 USD
View
A
Retailer 5
-
£3,526 GBP
$4,695 USD
View
Retailer 6
-
£3,846 GBP
$5,121 USD
View
Price last confirmed 13 days ago
A
Retailer 7
-
£4,614 GBP
HK$48,000 HKD
View
A
Retailer 8
-
£4,987 GBP
View
A
Retailer 9
-
£5,413 GBP
View
Retailer 10
-
£5,949 GBP
$7,922 USD
View
Price last confirmed 7 days ago
A
Retailer 11
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£6,577 GBP
$8,759 USD
View
A
Retailer 12
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£6,752 GBP
$8,991 USD
View
B+
Retailer 13
-
£7,225 GBP
€9,163 EUR
View
B+
Retailer 14
-
£8,004 GBP
View
B+
Retailer 15
-
£8,183 GBP
ZAR 176,054 ZAR
View
B+
Retailer 16
-
£9,589 GBP
$12,770 USD
View
B
Retailer 17
-
£13,360 GBP
SGD 24,043 SGD
View
B
Retailer 18
-
£13,719 GBP
$18,269 USD
View
B
Retailer 19
-
£16,686 GBP
$22,220 USD
View
B
Retailer 20
-
£16,686 GBP
$22,220 USD
View
Most Expensive
B
Do Amore Diamonds
27-E50AB4534 · Oct 29
£20,658 GBP
$27,510 USD
View
20 more retailers have this diamond
Prices start from £3,212 GBPSave up to £17,446 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
£3,212 GBP