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Cushion|Lab Grown|IGI

4.29ct D FL Cushion Lab Grown Diamond

EX • D/FL • IGI LG787620793

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG787620793

Diamond specifications and retailer prices

From £3,603 GBP
$4,828 USD
As of October 30, 2026
Save £11,522 GBP (76%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £15,125 GBP at With Clarity · As of October 31, 2026
View at With Clarity

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 LG787620793 or 787620793. Listed at 13 retailers as of October 30, 2026, with prices from £3,603 to £15,125, a £11,522 spread on the same certified stone. With Clarity lists it at £15,125. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle36.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG787620793
Dimensions10.59 × 8.81 × 5.78 mm
L/W Ratio1.20
Girdle conditionFaceted
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
10.59 mm8.81 mm4.29 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG787620793
Side View
Table 60.0%Crown 36.1°Girdle: THK-VTKPavilion 36.5°Culet: NoneDepth 65.6%

Caratlytics Score

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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: £4,753 GBP|Low: £3,603 GBP|High: £18,932 GBP|Avg: £9,089 GBP|-5.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
With Clarity
October 31, 2026
Retailer 5£3,603 GBP
Retailer 1£4,753 GBP
Retailer 11£4,767 GBP
Retailer 8£4,950 GBP
Retailer 12£6,273 GBP
Retailer 4£6,441 GBP
Retailer 6£7,142 GBP
Retailer 10£8,123 GBP
Retailer 2£8,474 GBP
Retailer 7£9,919 GBP
Retailer 3£10,988 GBP
Retailer 9£13,617 GBP
With Clarity£15,125 GBP

38 data points across 13 retailers

13 retailers£3,603 GBP to £15,125 GBP

A
Cheapest Retailer
-
£3,603 GBP
$4,828 USD
A
Retailer 2
-
£4,753 GBP
$6,368 USD
View
A
Retailer 3
-
£4,767 GBP
HK$49,900 HKD
View
A
Retailer 4
-
£4,950 GBP
View
A
Retailer 5
-
£6,273 GBP
€8,005 EUR
View
A
Retailer 6
-
£6,441 GBP
$8,630 USD
View
B+
Retailer 7
-
£7,142 GBP
$9,569 USD
View
B+
Retailer 8
-
£8,123 GBP
ZAR 175,837 ZAR
View
B+
Retailer 9
-
£8,474 GBP
View
B+
Retailer 10
-
£9,919 GBP
$13,290 USD
View
B+
Retailer 11
-
£10,988 GBP
$14,723 USD
View
B
Retailer 12
-
£13,617 GBP
$18,245 USD
View
Most Expensive
B
With Clarity
787620793 · Oct 31
£15,125 GBP
$20,266 USD
View
12 more retailers have this diamond
Prices start from £3,603 GBPSave up to £11,522 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
£3,603 GBP