Marquise|Lab Grown|IGI

5.50ct G VS2 Marquise Lab Grown Diamond

EX • G/VS2 • IGI LG635409128

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG635409128

Diamond specifications and retailer prices

From £578 GBP

$775 USD

As of November 2, 2026

Save £2,873 GBP (83%) vs most expensive(unlock to see where)

19 retailers carry this diamond

Most expensive: £3,450 GBP at Brilliant Earth · As of November 2, 2026

View at Brilliant Earth

About this 5.5ct lab-grown marquise diamond

This 5.5ct lab-grown marquise sits in the over five carat band, graded G colour (near-colourless) and VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG635409128 or 635409128. Listed at 19 retailers as of November 2, 2026, with prices from £578 to £3,450, a £2,873 spread on the same certified stone. Brilliant Earth lists it at £3,450. 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

5.50

Carat

Colour

VS2

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle35.5°

Pavilion angle39°

OriginLab Grown

Grading LabIGI

CertificateIGI LG635409128

Dimensions18.27 × 9.30 × 5.63 mm

L/W Ratio1.96

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

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG635409128

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 2

Current: £3,450 GBP|Low: £540 GBP|High: £6,163 GBP|Avg: £1,505 GBP|-44.0%

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

November 2, 2026

Retailer 5£578 GBP

Retailer 12£628 GBP

Retailer 10£663 GBP

Retailer 7£670 GBP

Retailer 2£749 GBP

Retailer 14£801 GBP

Retailer 3£960 GBP

Retailer 17£1,020 GBP

Retailer 11£1,027 GBP

Retailer 8£1,041 GBP

Retailer 16£1,475 GBP

Retailer 15£1,593 GBP

Retailer 13£1,884 GBP

Retailer 6£2,078 GBP

Retailer 18£2,265 GBP

Retailer 4£2,315 GBP

Retailer 9£2,488 GBP

Brilliant Earth£3,450 GBP

30 data points across 18 retailers

19 retailers£578 GBP to £3,450 GBP

Cheapest Retailer

£578 GBP

$775 USD

Retailer 2

£628 GBP

$843 USD

View

Retailer 3

£663 GBP

$890 USD

View

Price last confirmed 16 days ago

Retailer 4

£670 GBP

$899 USD

View

Retailer 5

£749 GBP

View

Retailer 6

£801 GBP

$1,075 USD

View

B+

Retailer 7

£960 GBP

$1,288 USD

View

Retailer 8

£1,020 GBP

$1,369 USD

View

Retailer 9

£1,027 GBP

View

Retailer 10

£1,041 GBP

€1,330 EUR

View

B+

Retailer 11

£1,475 GBP

$1,980 USD

View

B+

Retailer 12

£1,593 GBP

$2,138 USD

View

B+

Retailer 13

£1,884 GBP

$2,528 USD

View

B+

Retailer 14

£2,078 GBP

View

Retailer 15

£2,265 GBP

$3,039 USD

View

Retailer 16

£2,315 GBP

$3,106 USD

View

Retailer 17

£2,488 GBP

View

Price last confirmed 7 days ago

Retailer 18

£2,884 GBP

$3,870 USD

View

Most Expensive

Brilliant Earth

21793524A · Nov 2

£3,450 GBP

$4,630 USD

View

18 more retailers have this diamond

Prices start from £578 GBPSave up to £2,873 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.

Similar diamonds

5.50ct Marquise

£578 GBP