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 $12,427 NZD

$7,004 USD

As of October 30, 2026

Save $36,746 NZD (75%) vs most expensive(unlock to see where)

24 retailers carry this diamond

Most expensive: $49,173 NZD 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 $12,427 to $49,173, a $36,746 spread on the same certified stone. Taylor and Hart lists it at $49,173. 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: $22,090 NZD|Low: $12,427 NZD|High: $52,172 NZD|Avg: $20,266 NZD|-7.0%

Retailer 1

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

Retailer 19

Retailer 20

Taylor and Hart

October 30, 2026

Retailer 7$12,427 NZD

Retailer 5$12,906 NZD

Retailer 2$12,924 NZD

Retailer 11$13,305 NZD

Retailer 19$13,547 NZD

Retailer 4$14,345 NZD

Retailer 6$14,416 NZD

Retailer 9$14,416 NZD

Retailer 20$15,591 NZD

Retailer 8$17,113 NZD

Retailer 18$17,470 NZD

Retailer 13$17,551 NZD

Retailer 14$18,086 NZD

Retailer 10$20,632 NZD

Retailer 17$21,341 NZD

Retailer 1$22,090 NZD

Retailer 16$23,290 NZD

Retailer 3$26,316 NZD

Retailer 15$28,458 NZD

Retailer 12$33,473 NZD

Taylor and Hart$49,173 NZD

33 data points across 21 retailers

24 retailers$12,427 NZD to $49,173 NZD

Cheapest Retailer

$12,427 NZD

$7,004 USD

B+

Retailer 2

$12,906 NZD

$7,274 USD

View

Retailer 3

$12,924 NZD

$7,284 USD

View

Retailer 4

$13,305 NZD

$7,499 USD

View

Retailer 5

$13,547 NZD

$7,635 USD

View

B+

Retailer 6

$14,345 NZD

$8,085 USD

View

B+

Retailer 7

$14,416 NZD

$8,125 USD

View

Retailer 8

$14,416 NZD

$8,125 USD

View

Price last confirmed 14 days ago

B+

Retailer 9

$15,591 NZD

$8,787 USD

View

B+

Retailer 10

$17,113 NZD

$9,645 USD

View

B+

Retailer 11

$17,470 NZD

$9,846 USD

View

Final sale: no returns

Retailer 12

$17,551 NZD

£7,789 GBP

View

Price last confirmed 29 days ago

B+

Retailer 13

$18,086 NZD

£8,026 GBP

View

Retailer 14

$19,721 NZD

$11,115 USD

View

Price last confirmed 31 days ago

B+

Retailer 15

$20,632 NZD

£9,156 GBP

View

Retailer 16

$21,150 NZD

$11,920 USD

View

Price last confirmed 9 days ago

Retailer 17

$21,341 NZD

$12,028 USD

View

B+

Retailer 18

$22,090 NZD

$12,450 USD

View

B+

Retailer 19

$23,290 NZD

€12,501 EUR

View

B+

Retailer 20

$24,418 NZD

$13,762 USD

View

B+

Retailer 21

$26,316 NZD

$14,832 USD

View

Retailer 22

$28,458 NZD

£12,629 GBP

View

Retailer 23

$33,473 NZD

ZAR 304,774 ZAR

View

Most Expensive

Taylor and Hart

HWQ20GM · Oct 30

$49,173 NZD

$27,714 USD

View

23 more retailers have this diamond

Prices start from $12,427 NZDSave up to $36,746 NZD

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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3.51ct Marquise

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