Marquise|Lab Grown|IGI

3.45ct E FL Marquise Lab Grown Diamond

EX • E/FL • IGI LG799696875

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG799696875

Diamond specifications and retailer prices

From £3,814 GBP

$5,111 USD

As of October 31, 2026

Save £14,892 GBP (80%) vs most expensive(unlock to see where)

28 retailers carry this diamond

Most expensive: £18,707 GBP at Taylor and Hart · As of October 31, 2026

View at Taylor and Hart

About this 3.45ct lab-grown marquise diamond

This 3.45ct 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 LG799696875 or 799696875. Listed at 28 retailers as of October 31, 2026, with prices from £3,814 to £18,707, a £14,892 spread on the same certified stone. Taylor and Hart lists it at £18,707. 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

3.45

Carat

Colour

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle36.7°

Pavilion angle40.5°

OriginLab Grown

Grading LabIGI

CertificateIGI LG799696875

Dimensions15.24 × 7.93 × 5.02 mm

L/W Ratio1.92

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 LG799696875

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: £10,779 GBP|Low: £3,814 GBP|High: £28,973 GBP|Avg: £9,357 GBP|-1.3%

Retailer 1

Retailer 2

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Taylor and Hart

November 1, 2026

Retailer 7£3,814 GBP

Retailer 11£4,123 GBP

Retailer 2£4,211 GBP

Retailer 9£4,405 GBP

Retailer 10£4,413 GBP

Retailer 4£4,885 GBP

Retailer 22£4,885 GBP

Retailer 19£5,115 GBP

Retailer 21£5,279 GBP

Retailer 5£6,401 GBP

Retailer 17£6,742 GBP

Retailer 6£7,689 GBP

Retailer 3£7,956 GBP

Retailer 18£8,467 GBP

Retailer 20£9,307 GBP

Retailer 1£10,779 GBP

Retailer 23£12,082 GBP

Retailer 12£12,519 GBP

Retailer 14£12,668 GBP

Retailer 16£13,537 GBP

Retailer 13£13,935 GBP

Retailer 15£14,100 GBP

Taylor and Hart£18,707 GBP

Retailer 8£28,973 GBP

36 data points across 24 retailers

28 retailers£3,814 GBP to £18,707 GBP

Cheapest Retailer

£3,814 GBP

$5,111 USD

Retailer 2

£4,123 GBP

$5,525 USD

View

Retailer 3

£4,211 GBP

$5,642 USD

View

Retailer 4

£4,405 GBP

CA$8,198 CAD

View

Retailer 5

£4,413 GBP

$5,913 USD

View

Retailer 6

£4,885 GBP

$6,545 USD

View

Retailer 7

£4,885 GBP

$6,545 USD

View

Price last confirmed 16 days ago

Retailer 8

£4,885 GBP

$6,545 USD

View

B+

Retailer 9

£5,115 GBP

$6,853 USD

View

Final sale: no returns

B+

Retailer 10

£5,279 GBP

$7,073 USD

View

B+

Retailer 11

£6,401 GBP

$8,576 USD

View

B+

Retailer 12

£6,742 GBP

View

B+

Retailer 13

£7,689 GBP

View

Retailer 14

£7,956 GBP

$10,660 USD

View

B+

Retailer 15

£8,467 GBP

€10,804 EUR

View

B+

Retailer 16

£9,307 GBP

$12,470 USD

View

Retailer 17

£10,056 GBP

$13,474 USD

View

Retailer 18

£10,779 GBP

View

Retailer 19

£12,082 GBP

$16,189 USD

View

Retailer 20

£12,519 GBP

ZAR 270,989 ZAR

View

Retailer 21

£12,668 GBP

$16,974 USD

View

Retailer 22

£13,537 GBP

$18,138 USD

View

Retailer 23

£13,935 GBP

$18,671 USD

View

Price last confirmed 8 days ago

Retailer 24

£14,100 GBP

$18,893 USD

View

Retailer 25

£18,706 GBP

$25,064 USD

View

Most Expensive

Taylor and Hart

J9B9Q7H · Oct 31

£18,707 GBP

$25,065 USD

View

25 more retailers have this diamond

Prices start from £3,814 GBPSave up to £14,892 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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