Marquise|Lab Grown|IGI

3.51ct E FL Marquise Lab Grown Diamond

ID • E/FL • IGI LG717586084

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG717586084

Diamond specifications and retailer prices

From $9,971 AUD

$7,004 USD

As of October 30, 2026

Save $29,483 AUD (75%) vs most expensive(unlock to see where)

24 retailers carry this diamond

Most expensive: $39,454 AUD at Taylor and Hart · As of October 30, 2026

View at Taylor and Hart

About this 3.51ct lab-grown marquise diamond

This 3.51ct 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 LG717586084 or 717586084. Listed at 24 retailers as of October 30, 2026, with prices from $9,971 to $39,454, a $29,483 spread on the same certified stone. Taylor and Hart lists it at $39,454. 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

3.51

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle36.4°

Pavilion angle40.8°

OriginLab Grown

Grading LabIGI

CertificateIGI LG717586084

Dimensions15.17 × 7.77 × 5.08 mm

L/W Ratio1.95

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 LG717586084

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: $17,724 AUD|Low: $9,971 AUD|High: $41,860 AUD|Avg: $16,260 AUD|-7.0%

Retailer 1

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

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Taylor and Hart

October 30, 2026

Retailer 7$9,971 AUD

Retailer 5$10,355 AUD

Retailer 2$10,370 AUD

Retailer 11$10,676 AUD

Retailer 19$10,869 AUD

Retailer 4$11,510 AUD

Retailer 6$11,567 AUD

Retailer 9$11,567 AUD

Retailer 20$12,509 AUD

Retailer 8$13,731 AUD

Retailer 18$14,017 AUD

Retailer 13$14,082 AUD

Retailer 14$14,511 AUD

Retailer 10$16,554 AUD

Retailer 17$17,123 AUD

Retailer 1$17,724 AUD

Retailer 16$18,686 AUD

Retailer 3$21,115 AUD

Retailer 15$22,833 AUD

Retailer 12$26,857 AUD

Taylor and Hart$39,454 AUD

33 data points across 21 retailers

24 retailers$9,971 AUD to $39,454 AUD

Cheapest Retailer

$9,971 AUD

$7,004 USD

B+

Retailer 2

$10,355 AUD

$7,274 USD

View

Retailer 3

$10,370 AUD

$7,284 USD

View

Retailer 4

$10,676 AUD

$7,499 USD

View

Retailer 5

$10,869 AUD

$7,635 USD

View

B+

Retailer 6

$11,510 AUD

$8,085 USD

View

B+

Retailer 7

$11,567 AUD

$8,125 USD

View

Retailer 8

$11,567 AUD

$8,125 USD

View

Price last confirmed 15 days ago

B+

Retailer 9

$12,509 AUD

$8,787 USD

View

B+

Retailer 10

$13,731 AUD

$9,645 USD

View

B+

Retailer 11

$14,017 AUD

$9,846 USD

View

Final sale: no returns

Retailer 12

$14,082 AUD

£7,789 GBP

View

Price last confirmed 30 days ago

B+

Retailer 13

$14,511 AUD

£8,026 GBP

View

Retailer 14

$15,823 AUD

$11,115 USD

View

Price last confirmed 32 days ago

B+

Retailer 15

$16,554 AUD

£9,156 GBP

View

Retailer 16

$16,969 AUD

$11,920 USD

View

Price last confirmed 9 days ago

Retailer 17

$17,123 AUD

$12,028 USD

View

B+

Retailer 18

$17,724 AUD

$12,450 USD

View

B+

Retailer 19

$18,686 AUD

€12,501 EUR

View

B+

Retailer 20

$19,592 AUD

$13,762 USD

View

B+

Retailer 21

$21,115 AUD

$14,832 USD

View

Retailer 22

$22,833 AUD

£12,629 GBP

View

Retailer 23

$26,857 AUD

ZAR 304,774 ZAR

View

Most Expensive

Taylor and Hart

HWQ20GM · Oct 30

$39,454 AUD

$27,714 USD

View

23 more retailers have this diamond

Prices start from $9,971 AUDSave up to $29,483 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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