Marquise|Lab Grown|IGI

5.51ct E VS1 Marquise Lab Grown Diamond

EX • E/VS1 • IGI LG752586341

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG752586341

Diamond specifications and retailer prices

From $1,503 AUD

$1,056 USD

As of October 29, 2026

Save $7,665 AUD (84%) vs most expensive(unlock to see where)

15 retailers carry this diamond

Most expensive: $17,994 AUD at Brilliant Earth · As of October 22, 2026

View at Brilliant Earth

About this 5.51ct lab-grown marquise diamond

This 5.51ct lab-grown marquise sits in the over five carat band, graded E colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG752586341 or 752586341. Listed at 15 retailers as of October 29, 2026, with a 510% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

5.51

Carat

Colour

VS1

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle30.1°

Pavilion angle37.8°

OriginLab Grown

Grading LabIGI

CertificateIGI LG752586341

Dimensions18.69 × 9.56 × 5.35 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 LG752586341

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 29

Current: $9,168 AUD|Low: $1,157 AUD|High: $18,550 AUD|Avg: $5,283 AUD|-50.6%

Brilliant Earth

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

October 30, 2026

Retailer 7$1,503 AUD

Retailer 2$1,872 AUD

Retailer 5$2,306 AUD

Retailer 3$2,828 AUD

Retailer 4$3,163 AUD

Retailer 8$4,296 AUD

Retailer 6$4,827 AUD

Retailer 10$5,406 AUD

Retailer 9$8,093 AUD

Brilliant Earth$9,168 AUD

24 data points across 10 retailers

15 retailers$1,503 AUD to $9,168 AUD

Retailer 1

$1,342 AUD

$943 USD

Price last confirmed 20 days ago

Retailer 2

$1,503 AUD

$1,056 USD

View

Final sale: no returns

Retailer 3

$1,557 AUD

$1,094 USD

View

Price last confirmed 21 days ago

Retailer 4

$1,557 AUD

$1,094 USD

View

Price last confirmed 19 days ago

Retailer 5

$1,872 AUD

$1,315 USD

View

B+

Retailer 6

$2,306 AUD

$1,620 USD

View

Retailer 7

$2,828 AUD

€1,892 EUR

View

Retailer 8

$3,163 AUD

$2,222 USD

View

B+

Retailer 9

$4,296 AUD

£2,376 GBP

View

Retailer 10

$4,378 AUD

$3,075 USD

View

Price last confirmed 21 days ago

B+

Retailer 11

$4,827 AUD

$3,391 USD

View

B+

Retailer 12

$5,406 AUD

SGD 5,132 SGD

View

Retailer 13

$8,093 AUD

$5,685 USD

View

Price last confirmed 24 days ago

Retailer 14

$9,168 AUD

$6,440 USD

View

Most Expensive

Brilliant Earth

16806716A · Oct 22

$17,994 AUD

$12,640 USD

View

Price under review

14 more retailers have this diamond

Prices start from $1,503 AUDSave up to $7,665 AUD

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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5.51ct Marquise

$1,503 AUD