Marquise|Lab Grown|IGI

1.55ct E FL Marquise Lab Grown Diamond

ID • E/FL • IGI LG788617133

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG788617133

Diamond specifications and retailer prices

From £719 GBP

$964 USD

As of October 30, 2026

Save £2,236 GBP (76%) vs most expensive(unlock to see where)

26 retailers carry this diamond

Most expensive: £2,955 GBP at Brilliant Earth · As of October 30, 2026

View at Brilliant Earth

About this 1.55ct lab-grown marquise diamond

This 1.55ct lab-grown marquise sits in the one-and-a-half to two carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG788617133 or 788617133. Listed at 26 retailers as of October 30, 2026, with prices from £719 to £2,955, a £2,236 spread on the same certified stone. Brilliant Earth lists it at £2,955. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.55

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle36.1°

Pavilion angle39.1°

OriginLab Grown

Grading LabIGI

CertificateIGI LG788617133

Dimensions12.25 × 6.07 × 3.68 mm

L/W Ratio2.02

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 LG788617133

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: £2,955 GBP|Low: £719 GBP|High: £3,247 GBP|Avg: £1,628 GBP

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

Retailer 18

Retailer 19

Retailer 20

Retailer 21

Retailer 22

October 31, 2026

Retailer 8£719 GBP

Retailer 22£783 GBP

Retailer 5£834 GBP

Retailer 7£834 GBP

Retailer 13£865 GBP

Retailer 16£921 GBP

Retailer 6£964 GBP

Retailer 4£965 GBP

Retailer 21£966 GBP

Retailer 9£1,046 GBP

Retailer 10£1,194 GBP

Retailer 17£1,286 GBP

Retailer 18£1,309 GBP

Retailer 20£1,534 GBP

Retailer 2£1,596 GBP

Retailer 15£2,309 GBP

Retailer 3£2,480 GBP

Retailer 11£2,710 GBP

Retailer 12£2,800 GBP

Retailer 19£2,844 GBP

Retailer 14£2,905 GBP

Brilliant Earth£2,955 GBP

26 data points across 22 retailers

26 retailers£719 GBP to £2,955 GBP

Cheapest Retailer

£719 GBP

$964 USD

Retailer 2

£783 GBP

$1,049 USD

View

Retailer 3

£834 GBP

$1,118 USD

View

Price last confirmed 13 days ago

Retailer 4

£834 GBP

$1,118 USD

View

Retailer 5

£865 GBP

$1,159 USD

View

Final sale: no returns

Retailer 6

£921 GBP

View

Retailer 7

£964 GBP

$1,291 USD

View

Retailer 8

£965 GBP

HK$10,100 HKD

View

Retailer 9

£966 GBP

$1,295 USD

View

Retailer 10

£1,046 GBP

$1,401 USD

View

Retailer 11

£1,194 GBP

$1,600 USD

View

Retailer 12

£1,286 GBP

View

B+

Retailer 13

£1,309 GBP

€1,670 EUR

View

B+

Retailer 14

£1,401 GBP

A$2,888 AUD

View

B+

Retailer 15

£1,534 GBP

ZAR 33,197 ZAR

View

B+

Retailer 16

£1,596 GBP

$2,138 USD

View

B+

Retailer 17

£2,309 GBP

View

Retailer 18

£2,346 GBP

$3,143 USD

View

B+

Retailer 19

£2,480 GBP

$3,323 USD

View

B+

Retailer 20

£2,492 GBP

$3,339 USD

View

Retailer 21

£2,710 GBP

$3,631 USD

View

Retailer 22

£2,800 GBP

SGD 5,069 SGD

View

Retailer 23

£2,844 GBP

View

Retailer 24

£2,905 GBP

$3,892 USD

View

Retailer 25

£2,955 GBP

$3,960 USD

View

Price last confirmed 14 days ago

Most Expensive

Brilliant Earth

20473618A · Oct 30

£2,955 GBP

$3,960 USD

View

25 more retailers have this diamond

Prices start from £719 GBPSave up to £2,236 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.

Where to buy this spec

See every retailer carrying 1.55ct E FL marquise lab-grown

Ranked by inventory count, with return policy, certs, and trust signals.

Similar diamonds

1.55ct Marquise

£719 GBP