Cushion|Lab Grown|IGI

1.89ct D FL Cushion Lab Grown Diamond

EX • D/FL • IGI LG836607909

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG836607909

Diamond specifications and retailer prices

From £552 GBP

$739 USD

As of October 30, 2026

Save £2,807 GBP (84%) vs most expensive(unlock to see where)

17 retailers carry this diamond

Most expensive: £3,358 GBP at Brilliant Earth · As of October 30, 2026

View at Brilliant Earth

About this 1.89ct lab-grown cushion diamond

This 1.89ct 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 LG836607909 or 836607909. Listed at 17 retailers as of October 30, 2026, with prices from £552 to £3,358, a £2,807 spread on the same certified stone. Brilliant Earth lists it at £3,358. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.89

Carat

Colour

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle34°

Pavilion angle35.9°

OriginLab Grown

Grading LabIGI

CertificateIGI LG836607909

Dimensions9.08 × 6.22 × 4.18 mm

L/W Ratio1.46

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

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG836607909

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: £3,358 GBP|Low: £552 GBP|High: £4,523 GBP|Avg: £1,581 GBP|-25.7%

Brilliant Earth

Retailer 2

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Retailer 17

October 31, 2026

Retailer 4£552 GBP

Retailer 9£606 GBP

Retailer 13£639 GBP

Retailer 11£698 GBP

Retailer 10£901 GBP

Retailer 15£920 GBP

Retailer 2£961 GBP

Retailer 14£1,036 GBP

Retailer 16£1,220 GBP

Retailer 12£1,309 GBP

Retailer 3£1,752 GBP

Retailer 5£1,850 GBP

Retailer 17£1,946 GBP

Retailer 6£1,997 GBP

Retailer 8£2,391 GBP

Retailer 7£2,743 GBP

Brilliant Earth£3,358 GBP

27 data points across 17 retailers

17 retailers£552 GBP to £3,358 GBP

Cheapest Retailer

£552 GBP

$739 USD

Final sale: no returns

Retailer 2

£606 GBP

$812 USD

View

Price last confirmed 14 days ago

Retailer 3

£639 GBP

View

Retailer 4

£698 GBP

$935 USD

View

Retailer 5

£901 GBP

View

Retailer 6

£920 GBP

$1,233 USD

View

Retailer 7

£961 GBP

€1,226 EUR

View

Retailer 8

£1,036 GBP

ZAR 22,430 ZAR

View

Retailer 9

£1,220 GBP

$1,634 USD

View

B+

Retailer 10

£1,309 GBP

$1,754 USD

View

B+

Retailer 11

£1,752 GBP

View

B+

Retailer 12

£1,850 GBP

$2,479 USD

View

B+

Retailer 13

£1,946 GBP

$2,607 USD

View

B+

Retailer 14

£1,997 GBP

SGD 3,615 SGD

View

Retailer 15

£2,391 GBP

View

Price last confirmed 13 days ago

Retailer 16

£2,743 GBP

$3,675 USD

View

Price last confirmed 10 days ago

Most Expensive

Brilliant Earth

21640937A · Oct 30

£3,358 GBP

$4,500 USD

View

16 more retailers have this diamond

Prices start from £552 GBPSave up to £2,807 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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1.89ct Cushion

£552 GBP