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Cushion|Lab Grown|IGI

4.29ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG780665785

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG780665785

Diamond specifications and retailer prices

From £3,001 GBP
$4,021 USD
As of October 30, 2026
Save £15,695 GBP (84%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £18,696 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 4.29ct lab-grown cushion diamond

This 4.29ct 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 LG780665785 or 780665785. Listed at 11 retailers as of October 30, 2026, with prices from £3,001 to £18,696, a £15,695 spread on the same certified stone. Do Amore Diamonds lists it at £18,696. 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

4.29
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle35.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780665785
Dimensions10.81 × 8.72 × 5.69 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
10.81 mm8.72 mm4.29 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780665785
Side View
Table 62.0%Crown 34.7°Girdle: STK-THKPavilion 35.6°Culet: NoneDepth 65.3%

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 30
Current: £18,696 GBP|Low: £3,001 GBP|High: £24,748 GBP|Avg: £8,448 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 2£3,001 GBP
Retailer 7£3,150 GBP
Retailer 5£3,564 GBP
Retailer 11£4,275 GBP
Retailer 10£5,081 GBP
Retailer 6£5,997 GBP
Retailer 3£6,391 GBP
Retailer 8£7,492 GBP
Retailer 9£8,646 GBP
Retailer 4£9,919 GBP
Do Amore Diamonds£18,696 GBP

28 data points across 11 retailers

11 retailers£3,001 GBP to £18,696 GBP

A+
Cheapest Retailer
-
£3,001 GBP
$4,021 USD
A
Retailer 2
-
£3,150 GBP
$4,220 USD
View
A
Retailer 3
-
£3,564 GBP
$4,775 USD
View
A
Retailer 4
-
£4,275 GBP
$5,728 USD
View
Final sale: no returns
A
Retailer 5
-
£5,081 GBP
$6,808 USD
View
A
Retailer 6
-
£5,997 GBP
€7,653 EUR
View
Retailer 7
-
£6,391 GBP
$8,563 USD
View
Price last confirmed 82 days ago
B+
Retailer 8
-
£7,492 GBP
View
B+
Retailer 9
-
£8,646 GBP
$11,585 USD
View
B+
Retailer 10
-
£9,919 GBP
$13,290 USD
View
Most Expensive
B
Do Amore Diamonds
27-BE0FC0767 · Oct 31
£18,696 GBP
$25,050 USD
View
10 more retailers have this diamond
Prices start from £3,001 GBPSave up to £15,695 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+
4.29ct Cushion
£3,001 GBP