Cushion|Lab Grown|IGI

4.29ct D FL Cushion Lab Grown Diamond

EX • D/FL • IGI LG808634528

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG808634528

Diamond specifications and retailer prices

From £4,336 GBP

$5,810 USD

As of October 26, 2026

Save £21,962 GBP (84%) vs most expensive(unlock to see where)

21 retailers carry this diamond

Most expensive: £26,298 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 LG808634528 or 808634528. Listed at 21 retailers as of October 26, 2026, with prices from £4,336 to £26,298, a £21,962 spread on the same certified stone. With Clarity lists it at £26,298. 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

Colour

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle36.7°

Pavilion angle38.3°

OriginLab Grown

Grading LabIGI

CertificateIGI LG808634528

Dimensions11.52 × 8.52 × 5.64 mm

L/W Ratio1.35

Girdle conditionFaceted

Cert comments

This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG808634528

Side View

Caratlytics Score

How it works →

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 26

Current: £8,123 GBP|Low: £4,187 GBP|High: £17,337 GBP|Avg: £8,672 GBP|+2.3%

Retailer 1

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

Retailer 12

Retailer 13

Retailer 14

October 31, 2026

Retailer 11£4,336 GBP

Retailer 6£5,162 GBP

Retailer 14£5,175 GBP

Retailer 2£5,230 GBP

Retailer 7£5,933 GBP

Retailer 8£6,483 GBP

Retailer 4£7,370 GBP

Retailer 1£8,123 GBP

Retailer 13£8,762 GBP

Retailer 10£10,586 GBP

Retailer 9£11,014 GBP

Retailer 12£11,579 GBP

Retailer 5£13,355 GBP

Retailer 3£17,337 GBP

43 data points across 14 retailers

21 retailers£4,336 GBP to £26,298 GBP

Cheapest Retailer

£4,336 GBP

$5,810 USD

Retailer 2

£4,819 GBP

CA$8,968 CAD

View

Retailer 3

£5,162 GBP

$6,917 USD

View

Retailer 4

£5,168 GBP

$6,925 USD

View

Retailer 5

£5,175 GBP

$6,934 USD

View

Price last confirmed 15 days ago

Retailer 6

£5,230 GBP

$7,008 USD

View

Retailer 7

£5,933 GBP

$7,949 USD

View

Final sale: no returns

Retailer 8

£6,483 GBP

View

B+

Retailer 9

£7,370 GBP

View

B+

Retailer 10

£8,123 GBP

€10,366 EUR

View

B+

Retailer 11

£8,762 GBP

$11,740 USD

View

B+

Retailer 12

£10,586 GBP

View

B+

Retailer 13

£11,014 GBP

ZAR 238,413 ZAR

View

Retailer 14

£11,579 GBP

$15,515 USD

View

Retailer 15

£13,355 GBP

$17,894 USD

View

Retailer 16

£13,959 GBP

$18,704 USD

View

Retailer 17

£14,397 GBP

$19,291 USD

View

Retailer 18

£15,228 GBP

$20,404 USD

View

Retailer 19

£17,337 GBP

$23,230 USD

View

Price last confirmed 38 days ago

Retailer 20

£18,069 GBP

$24,211 USD

View

Most Expensive

With Clarity

808634528 · Oct 31

£26,298 GBP

$35,236 USD

View

20 more retailers have this diamond

Prices start from £4,336 GBPSave up to £21,962 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.

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