Cushion|Lab Grown|IGI

1.83ct D FL Cushion Lab Grown Diamond

VG • D/FL • IGI LG840634991

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG840634991

Diamond specifications and retailer prices

From £534 GBP

$716 USD

As of October 30, 2026

Save £2,705 GBP (84%) vs most expensive(unlock to see where)

17 retailers carry this diamond

Most expensive: £3,239 GBP at Brilliant Earth · As of October 30, 2026

View at Brilliant Earth

About this 1.83ct lab-grown cushion diamond

This 1.83ct 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 very-good cut grade and certified by IGI LG840634991 or 840634991. Listed at 17 retailers as of October 30, 2026, with prices from £534 to £3,239, a £2,705 spread on the same certified stone. Brilliant Earth lists it at £3,239. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.83

Carat

Colour

Clarity

Very Good

Cut

Specifications

CutVery Good

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle34.6°

Pavilion angle34.8°

OriginLab Grown

Grading LabIGI

CertificateIGI LG840634991

Dimensions9.18 × 6.13 × 4.11 mm

L/W Ratio1.50

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

CutVery Good

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG840634991

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: £3,239 GBP|Low: £534 GBP|High: £4,373 GBP|Avg: £1,582 GBP|-25.9%

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

October 31, 2026

Retailer 4£534 GBP

Retailer 10£620 GBP

Retailer 15£675 GBP

Retailer 5£739 GBP

Retailer 16£893 GBP

Retailer 11£916 GBP

Retailer 12£938 GBP

Retailer 14£1,005 GBP

Retailer 17£1,149 GBP

Retailer 2£1,267 GBP

Retailer 6£1,791 GBP

Retailer 3£1,887 GBP

Retailer 7£1,936 GBP

Retailer 13£2,316 GBP

Retailer 9£2,626 GBP

Retailer 8£2,653 GBP

Brilliant Earth£3,239 GBP

13 data points across 17 retailers

17 retailers£534 GBP to £3,239 GBP

Cheapest Retailer

£534 GBP

$716 USD

Final sale: no returns

Retailer 2

£620 GBP

View

Retailer 3

£675 GBP

$905 USD

View

Retailer 4

£739 GBP

$990 USD

View

Retailer 5

£893 GBP

$1,197 USD

View

Retailer 6

£916 GBP

View

Retailer 7

£938 GBP

€1,197 EUR

View

Retailer 8

£1,005 GBP

ZAR 21,748 ZAR

View

Retailer 9

£1,149 GBP

$1,540 USD

View

B+

Retailer 10

£1,267 GBP

$1,698 USD

View

B+

Retailer 11

£1,791 GBP

$2,400 USD

View

B+

Retailer 12

£1,887 GBP

$2,529 USD

View

B+

Retailer 13

£1,936 GBP

SGD 3,505 SGD

View

Retailer 14

£2,316 GBP

View

Retailer 15

£2,626 GBP

$3,519 USD

View

Retailer 16

£2,653 GBP

$3,555 USD

View

Price last confirmed 10 days ago

Most Expensive

Brilliant Earth

21861636A · Oct 30

£3,239 GBP

$4,340 USD

View

16 more retailers have this diamond

Prices start from £534 GBPSave up to £2,705 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

1.83ct Cushion

£534 GBP