Marquise|Lab Grown|IGI

2.55ct D IF Marquise Lab Grown Diamond

EX • D/IF • IGI LG780664158

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG780664158

Diamond specifications and retailer prices

From £2,032 GBP

$2,722 USD

As of October 31, 2026

Save £9,099 GBP (82%) vs most expensive(unlock to see where)

16 retailers carry this diamond

Most expensive: £11,130 GBP at With Clarity · As of November 2, 2026

View at With Clarity

About this 2.55ct lab-grown marquise diamond

This 2.55ct lab-grown marquise sits in the two to three carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG780664158 or 780664158. Listed at 16 retailers as of October 31, 2026, with prices from £2,032 to £11,130, a £9,099 spread on the same certified stone. With Clarity lists it at £11,130. 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

2.55

Carat

Colour

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle36.9°

Pavilion angle39.7°

OriginLab Grown

Grading LabIGI

CertificateIGI LG780664158

Dimensions13.79 × 7.10 × 4.49 mm

L/W Ratio1.94

Girdle conditionFaceted

Culet sizePointed

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 LG780664158

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 31

Current: £3,792 GBP|Low: £1,867 GBP|High: £14,083 GBP|Avg: £5,797 GBP|-27.7%

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

With Clarity

November 2, 2026

Retailer 6£1,867 GBP

Retailer 4£2,032 GBP

Retailer 2£2,549 GBP

Retailer 8£3,516 GBP

Retailer 11£3,571 GBP

Retailer 1£3,792 GBP

Retailer 5£4,320 GBP

Retailer 15£4,597 GBP

Retailer 9£5,045 GBP

Retailer 13£7,122 GBP

Retailer 10£7,218 GBP

Retailer 14£7,345 GBP

Retailer 3£7,536 GBP

Retailer 12£8,116 GBP

Retailer 7£9,974 GBP

With Clarity£11,130 GBP

26 data points across 16 retailers

16 retailers£2,032 GBP to £11,130 GBP

Cheapest Retailer

£2,032 GBP

$2,722 USD

Retailer 2

£2,549 GBP

$3,415 USD

View

B+

Retailer 3

£3,516 GBP

HK$36,800 HKD

View

B+

Retailer 4

£3,571 GBP

$4,785 USD

View

B+

Retailer 5

£3,792 GBP

View

B+

Retailer 6

£4,320 GBP

$5,788 USD

View

B+

Retailer 7

£4,597 GBP

€5,866 EUR

View

B+

Retailer 8

£4,888 GBP

$6,550 USD

View

Retailer 9

£5,045 GBP

$6,760 USD

View

Retailer 10

£7,122 GBP

$9,543 USD

View

Retailer 11

£7,218 GBP

View

Retailer 12

£7,345 GBP

ZAR 158,992 ZAR

View

Retailer 13

£7,536 GBP

$10,098 USD

View

Price last confirmed 8 days ago

Retailer 14

£8,116 GBP

A$16,731 AUD

View

Retailer 15

£9,974 GBP

$13,364 USD

View

Most Expensive

With Clarity

780664158 · Nov 2

£11,130 GBP

$14,913 USD

View

15 more retailers have this diamond

Prices start from £2,032 GBPSave up to £9,099 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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2.55ct Marquise

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