Cushion|Lab Grown|IGI

1.76ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG840632406

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG840632406

Diamond specifications and retailer prices

From £513 GBP

$688 USD

As of October 30, 2026

Save £2,218 GBP (81%) vs most expensive(unlock to see where)

18 retailers carry this diamond

Most expensive: £2,732 GBP at Brilliant Earth · As of October 30, 2026

View at Brilliant Earth

About this 1.76ct lab-grown cushion diamond

This 1.76ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG840632406 or 840632406. Listed at 18 retailers as of October 30, 2026, with prices from £513 to £2,732, a £2,218 spread on the same certified stone. Brilliant Earth lists it at £2,732. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.76

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle34.9°

Pavilion angle39°

OriginLab Grown

Grading LabIGI

CertificateIGI LG840632406

Dimensions8.61 × 5.95 × 4.15 mm

L/W Ratio1.45

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

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG840632406

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 30

Current: £2,732 GBP|Low: £513 GBP|High: £3,306 GBP|Avg: £1,507 GBP|-17.4%

Brilliant Earth

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

Retailer 15

Retailer 16

Retailer 17

Retailer 18

October 31, 2026

Retailer 4£513 GBP

Retailer 12£597 GBP

Retailer 16£649 GBP

Retailer 6£726 GBP

Retailer 17£864 GBP

Retailer 2£882 GBP

Retailer 13£904 GBP

Retailer 15£968 GBP

Retailer 18£1,070 GBP

Retailer 11£1,219 GBP

Retailer 5£1,638 GBP

Retailer 7£1,784 GBP

Retailer 3£1,821 GBP

Retailer 8£1,866 GBP

Retailer 9£2,235 GBP

Retailer 14£2,459 GBP

Retailer 10£2,538 GBP

Brilliant Earth£2,732 GBP

18 data points across 18 retailers

18 retailers£513 GBP to £2,732 GBP

Cheapest Retailer

£513 GBP

$688 USD

Final sale: no returns

Retailer 2

£597 GBP

View

Retailer 3

£649 GBP

$870 USD

View

Retailer 4

£726 GBP

$973 USD

View

Retailer 5

£864 GBP

$1,157 USD

View

Retailer 6

£882 GBP

View

Retailer 7

£904 GBP

€1,154 EUR

View

Retailer 8

£968 GBP

ZAR 20,953 ZAR

View

Retailer 9

£1,070 GBP

$1,434 USD

View

B+

Retailer 10

£1,219 GBP

$1,633 USD

View

B+

Retailer 11

£1,638 GBP

View

B+

Retailer 12

£1,784 GBP

$2,391 USD

View

B+

Retailer 13

£1,821 GBP

$2,440 USD

View

B+

Retailer 14

£1,866 GBP

SGD 3,379 SGD

View

Retailer 15

£2,235 GBP

$2,995 USD

View

Price last confirmed 11 days ago

Retailer 16

£2,459 GBP

View

Retailer 17

£2,538 GBP

$3,400 USD

View

Most Expensive

Brilliant Earth

21826846A · Oct 30

£2,732 GBP

$3,660 USD

View

17 more retailers have this diamond

Prices start from £513 GBPSave up to £2,218 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.

Similar diamonds

1.76ct Cushion

£513 GBP