Marquise|Lab Grown|IGI

4.54ct E FL Marquise Lab Grown Diamond

EX • E/FL • IGI LG812649300

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG812649300

Diamond specifications and retailer prices

From £6,795 GBP

$9,104 USD

As of October 31, 2026

Save £21,137 GBP (76%) vs most expensive(unlock to see where)

23 retailers carry this diamond

Most expensive: £27,932 GBP at Taylor and Hart · As of October 31, 2026

View at Taylor and Hart

About this 4.54ct lab-grown marquise diamond

This 4.54ct lab-grown marquise sits in the three to five carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG812649300 or 812649300. Listed at 23 retailers as of October 31, 2026, with prices from £6,795 to £27,932, a £21,137 spread on the same certified stone. Taylor and Hart lists it at £27,932. 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

4.54

Carat

Colour

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle37°

Pavilion angle40.3°

OriginLab Grown

Grading LabIGI

CertificateIGI LG812649300

Dimensions17.65 × 8.59 × 5.27 mm

L/W Ratio2.05

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

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG812649300

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: £11,022 GBP|Low: £6,677 GBP|High: £43,004 GBP|Avg: £14,176 GBP|+14.0%

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Taylor and Hart

November 2, 2026

Retailer 15£6,677 GBP

Retailer 8£6,795 GBP

Retailer 3£6,910 GBP

Retailer 17£7,233 GBP

Retailer 26£7,335 GBP

Retailer 14£8,069 GBP

Retailer 18£8,069 GBP

Retailer 23£8,228 GBP

Retailer 24£8,228 GBP

Retailer 2£8,751 GBP

Retailer 25£8,903 GBP

Retailer 16£9,074 GBP

Retailer 22£9,226 GBP

Retailer 1£11,022 GBP

Retailer 28£12,469 GBP

Retailer 13£12,770 GBP

Retailer 20£12,782 GBP

Retailer 9£13,262 GBP

Retailer 4£13,934 GBP

Retailer 12£14,542 GBP

Retailer 10£15,022 GBP

Retailer 5£17,255 GBP

Retailer 27£19,706 GBP

Retailer 19£21,096 GBP

Retailer 7£23,081 GBP

Retailer 11£23,389 GBP

Taylor and Hart£27,932 GBP

Retailer 21£40,709 GBP

Retailer 6£43,004 GBP

22 data points across 29 retailers

23 retailers£6,795 GBP to £27,932 GBP

Retailer 1

£6,677 GBP

$8,947 USD

Price last confirmed 31 days ago

Retailer 2

£6,795 GBP

$9,104 USD

View

Retailer 3

£6,910 GBP

$9,259 USD

View

Retailer 4

£7,335 GBP

CA$13,650 CAD

View

Retailer 5

£7,875 GBP

$10,552 USD

View

Retailer 6

£8,069 GBP

$10,811 USD

View

Price last confirmed 30 days ago

Retailer 7

£8,228 GBP

$11,025 USD

View

Retailer 8

£8,228 GBP

$11,025 USD

View

Retailer 9

£8,903 GBP

$11,929 USD

View

Final sale: no returns

Retailer 10

£9,074 GBP

$12,158 USD

View

Price last confirmed 32 days ago

Retailer 11

£9,226 GBP

$12,362 USD

View

B+

Retailer 12

£11,022 GBP

View

B+

Retailer 13

£12,469 GBP

$16,707 USD

View

B+

Retailer 14

£13,262 GBP

View

B+

Retailer 15

£13,934 GBP

$18,670 USD

View

B+

Retailer 16

£14,542 GBP

View

B+

Retailer 17

£15,022 GBP

$20,128 USD

View

Retailer 18

£17,255 GBP

$23,120 USD

View

Retailer 19

£19,706 GBP

ZAR 426,548 ZAR

View

Retailer 20

£23,081 GBP

$30,926 USD

View

Retailer 21

£23,389 GBP

$31,339 USD

View

Most Expensive

Taylor and Hart

5S5SWTS · Oct 31

£27,932 GBP

$37,426 USD

View

21 more retailers have this diamond

Prices start from £6,795 GBPSave up to £21,137 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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