Cushion|Lab Grown|IGI

1.86ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG840633271

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG840633271

Diamond specifications and retailer prices

From £555 GBP

$743 USD

As of October 30, 2026

Save £2,558 GBP (82%) vs most expensive(unlock to see where)

19 retailers carry this diamond

Most expensive: £3,112 GBP at Brilliant Earth · As of October 30, 2026

View at Brilliant Earth

About this 1.86ct lab-grown cushion diamond

This 1.86ct 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 LG840633271 or 840633271. Listed at 19 retailers as of October 30, 2026, with prices from £555 to £3,112, a £2,558 spread on the same certified stone. Brilliant Earth lists it at £3,112. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.86

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle35°

Pavilion angle38.8°

OriginLab Grown

Grading LabIGI

CertificateIGI LG840633271

Dimensions7.16 × 6.99 × 4.77 mm

L/W Ratio1.02

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 LG840633271

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: £3,112 GBP|Low: £409 GBP|High: £4,448 GBP|Avg: £1,624 GBP|-30.0%

Brilliant Earth

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October 30, 2026

Retailer 4£555 GBP

Retailer 11£557 GBP

Retailer 12£599 GBP

Retailer 16£653 GBP

Retailer 7£731 GBP

Retailer 17£865 GBP

Retailer 13£884 GBP

Retailer 15£970 GBP

Retailer 14£973 GBP

Retailer 19£1,176 GBP

Retailer 6£1,638 GBP

Retailer 3£1,825 GBP

Retailer 2£1,927 GBP

Retailer 8£2,005 GBP

Retailer 18£2,454 GBP

Retailer 10£2,668 GBP

Retailer 9£2,694 GBP

Retailer 5£2,826 GBP

Brilliant Earth£3,112 GBP

23 data points across 19 retailers

19 retailers£555 GBP to £3,112 GBP

Cheapest Retailer

£555 GBP

$743 USD

Final sale: no returns

Retailer 2

£557 GBP

$746 USD

View

Price last confirmed 14 days ago

Retailer 3

£599 GBP

View

Retailer 4

£653 GBP

$875 USD

View

Retailer 5

£731 GBP

$979 USD

View

Retailer 6

£865 GBP

$1,159 USD

View

Retailer 7

£884 GBP

View

Retailer 8

£970 GBP

ZAR 20,998 ZAR

View

Retailer 9

£973 GBP

€1,241 EUR

View

Retailer 10

£1,176 GBP

$1,576 USD

View

B+

Retailer 11

£1,638 GBP

View

B+

Retailer 12

£1,825 GBP

$2,445 USD

View

B+

Retailer 13

£1,927 GBP

$2,582 USD

View

B+

Retailer 14

£2,005 GBP

SGD 3,631 SGD

View

B+

Retailer 15

£2,454 GBP

View

Retailer 16

£2,668 GBP

$3,575 USD

View

Retailer 17

£2,694 GBP

$3,610 USD

View

Price last confirmed 9 days ago

Retailer 18

£2,826 GBP

$3,787 USD

View

Most Expensive

Brilliant Earth

21729253A · Oct 30

£3,112 GBP

$4,170 USD

View

18 more retailers have this diamond

Prices start from £555 GBPSave up to £2,558 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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