Cushion|Lab Grown|IGI

2.57ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG790645996

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG790645996

Diamond specifications and retailer prices

From £1,377 GBP

$1,834 USD

As of October 28, 2026

Save £3,631 GBP (73%) vs most expensive(unlock to see where)

16 retailers carry this diamond

Most expensive: £5,009 GBP at Taylor and Hart · As of October 27, 2026

View at Taylor and Hart

About this 2.57ct lab-grown cushion diamond

This 2.57ct lab-grown cushion sits in the two to three carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG790645996 or 790645996. Listed at 16 retailers as of October 27, 2026, with prices from £1,377 to £5,009, a £3,631 spread on the same certified stone. Taylor and Hart lists it at £5,009. 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

2.57

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle34.6°

Pavilion angle31.1°

OriginLab Grown

Grading LabIGI

CertificateIGI LG790645996

Dimensions9.85 × 6.95 × 4.48 mm

L/W Ratio1.42

Girdle conditionFaceted

Culet sizePointed

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

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG790645996

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 28

Current: £2,022 GBP|Low: £1,377 GBP|High: £5,385 GBP|Avg: £2,937 GBP|-8.8%

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

Retailer 15

Taylor and Hart

October 29, 2026

Retailer 2£1,377 GBP

Retailer 3£1,427 GBP

Retailer 9£1,451 GBP

Retailer 13£1,554 GBP

Retailer 5£1,618 GBP

Retailer 1£2,022 GBP

Retailer 10£2,041 GBP

Retailer 4£2,201 GBP

Retailer 6£2,953 GBP

Retailer 12£3,392 GBP

Retailer 8£3,681 GBP

Retailer 15£3,845 GBP

Retailer 11£4,080 GBP

Retailer 14£4,342 GBP

Retailer 7£4,769 GBP

Taylor and Hart£5,009 GBP

41 data points across 16 retailers

16 retailers£1,377 GBP to £5,009 GBP

Cheapest Retailer

£1,377 GBP

$1,834 USD

Final sale: no returns

Retailer 2

£1,427 GBP

$1,900 USD

View

Price last confirmed 16 days ago

Retailer 3

£1,451 GBP

View

Retailer 4

£1,554 GBP

$2,070 USD

View

Retailer 5

£1,618 GBP

$2,154 USD

View

Retailer 6

£2,022 GBP

View

Retailer 7

£2,041 GBP

$2,718 USD

View

Retailer 8

£2,201 GBP

$2,931 USD

View

B+

Retailer 9

£2,953 GBP

View

B+

Retailer 10

£3,392 GBP

A$6,950 AUD

View

Price last confirmed 7 days ago

B+

Retailer 11

£3,681 GBP

ZAR 79,185 ZAR

View

B+

Retailer 12

£3,845 GBP

$5,120 USD

View

B+

Retailer 13

£4,080 GBP

View

Retailer 14

£4,342 GBP

$5,782 USD

View

B+

Retailer 15

£4,769 GBP

SGD 8,583 SGD

View

Most Expensive

Taylor and Hart

Y9RBHW7 · Oct 27

£5,009 GBP

$6,670 USD

View

15 more retailers have this diamond

Prices start from £1,377 GBPSave up to £3,631 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

2.57ct Cushion

£1,377 GBP