Marquise|Lab Grown|IGI

2.57ct F IF Marquise Lab Grown Diamond

ID • F/IF • IGI LG837640757

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG837640757

Diamond specifications and retailer prices

From £823 GBP

$1,104 USD

As of November 1, 2026

Save £4,528 GBP (85%) vs most expensive(unlock to see where)

19 retailers carry this diamond

Most expensive: £5,350 GBP at Brilliant Earth · As of November 2, 2026

View at Brilliant Earth

About this 2.57ct lab-grown marquise diamond

This 2.57ct lab-grown marquise sits in the two to three carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG837640757 or 837640757. Listed at 19 retailers as of November 1, 2026, with prices from £823 to £5,350, a £4,528 spread on the same certified stone. Brilliant Earth lists it at £5,350. 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 angle38.1°

Pavilion angle39.4°

OriginLab Grown

Grading LabIGI

CertificateIGI LG837640757

Dimensions15.09 × 7.01 × 4.20 mm

L/W Ratio2.15

Girdle conditionFaceted

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 LG837640757

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: Nov 1

Current: £5,350 GBP|Low: £823 GBP|High: £5,358 GBP|Avg: £2,160 GBP|-0.1%

Brilliant Earth

Retailer 2

Retailer 3

Retailer 4

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Retailer 7

Retailer 8

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Retailer 11

Retailer 12

Retailer 13

Retailer 14

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Retailer 17

Retailer 18

November 2, 2026

Retailer 3£823 GBP

Retailer 2£963 GBP

Retailer 6£984 GBP

Retailer 4£1,221 GBP

Retailer 17£1,293 GBP

Retailer 11£1,315 GBP

Retailer 7£1,626 GBP

Retailer 18£1,837 GBP

Retailer 14£2,024 GBP

Retailer 16£2,199 GBP

Retailer 9£2,351 GBP

Retailer 13£2,643 GBP

Retailer 12£2,891 GBP

Retailer 8£2,970 GBP

Retailer 5£3,074 GBP

Retailer 15£3,245 GBP

Retailer 10£3,294 GBP

Brilliant Earth£5,350 GBP

24 data points across 18 retailers

19 retailers£823 GBP to £5,350 GBP

Cheapest Retailer

£823 GBP

$1,104 USD

Final sale: no returns

Retailer 2

£963 GBP

View

Retailer 3

£984 GBP

$1,320 USD

View

Retailer 4

£1,221 GBP

$1,638 USD

View

Retailer 5

£1,293 GBP

€1,653 EUR

View

Retailer 6

£1,315 GBP

View

Retailer 7

£1,626 GBP

$2,182 USD

View

Retailer 8

£1,837 GBP

$2,465 USD

View

Retailer 9

£2,024 GBP

A$4,178 AUD

View

Retailer 10

£2,199 GBP

ZAR 47,676 ZAR

View

B+

Retailer 11

£2,351 GBP

View

B+

Retailer 12

£2,643 GBP

$3,547 USD

View

B+

Retailer 13

£2,891 GBP

View

B+

Retailer 14

£2,970 GBP

$3,986 USD

View

B+

Retailer 15

£3,074 GBP

$4,125 USD

View

B+

Retailer 16

£3,245 GBP

A$6,699 AUD

View

Retailer 17

£3,294 GBP

SGD 5,973 SGD

View

Retailer 18

£3,730 GBP

$5,006 USD

View

Price last confirmed 20 days ago

Most Expensive

Brilliant Earth

21558666A · Nov 2

£5,350 GBP

$7,180 USD

View

18 more retailers have this diamond

Prices start from £823 GBPSave up to £4,528 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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