Marquise|Lab Grown|IGI

4.26ct D IF Marquise Lab Grown Diamond

EX • D/IF • IGI LG754595411

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG754595411

Diamond specifications and retailer prices

From $23,687 AUD

$16,639 USD

As of November 1, 2026

Save $36,124 AUD (60%) vs most expensive(unlock to see where)

29 retailers carry this diamond

Most expensive: $59,811 AUD at Cape Diamonds · As of October 29, 2026

View at Cape Diamonds

About this 4.26ct lab-grown marquise diamond

This 4.26ct lab-grown marquise sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG754595411 or 754595411. Listed at 29 retailers as of October 29, 2026, with prices from $23,687 to $59,811, a $36,124 spread on the same certified stone. Cape Diamonds lists it at $59,811. 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

4.26

Carat

Colour

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle36.5°

Pavilion angle40.7°

OriginLab Grown

Grading LabIGI

CertificateIGI LG754595411

Dimensions16.53 × 8.39 × 5.37 mm

L/W Ratio1.97

Girdle conditionFaceted

Culet sizePointed

Cert comments

As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG754595411

Side View

Caratlytics Score

How it works →

B+

Very Good

Strong quality and value balance

Unlock full score analysis

See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1

Current: $59,811 AUD|Low: $22,966 AUD|High: $104,736 AUD|Avg: $44,711 AUD|+1.9%

Cape Diamonds

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

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Retailer 17

November 2, 2026

Retailer 5$23,687 AUD

Retailer 17$24,223 AUD

Retailer 8$25,541 AUD

Retailer 9$25,726 AUD

Retailer 13$27,130 AUD

Retailer 16$28,085 AUD

Retailer 15$30,736 AUD

Retailer 2$31,027 AUD

Retailer 6$40,245 AUD

Retailer 11$44,136 AUD

Retailer 14$47,852 AUD

Retailer 12$48,675 AUD

Retailer 3$50,774 AUD

Cape Diamonds$59,811 AUD

Retailer 10$60,936 AUD

Retailer 7$78,451 AUD

Retailer 4$104,736 AUD

34 data points across 17 retailers

29 retailers$23,687 AUD to $59,811 AUD

Retailer 1

$17,055 AUD

$11,980 USD

Price last confirmed 84 days ago

B+

Retailer 2

$23,687 AUD

$16,639 USD

View

B+

Retailer 3

$24,223 AUD

$17,015 USD

View

Retailer 4

$24,223 AUD

$17,015 USD

View

Price last confirmed 24 days ago

Retailer 5

$24,223 AUD

$17,015 USD

View

Price last confirmed 33 days ago

Retailer 6

$24,805 AUD

$17,424 USD

View

Price last confirmed 34 days ago

B+

Retailer 7

$25,541 AUD

$17,941 USD

View

B+

Retailer 8

$25,726 AUD

$18,071 USD

View

B+

Retailer 9

$26,334 AUD

$18,498 USD

View

Retailer 10

$26,334 AUD

$18,498 USD

View

Price last confirmed 22 days ago

Retailer 11

$26,334 AUD

$18,498 USD

View

Price last confirmed 32 days ago

B+

Retailer 12

$27,130 AUD

$19,057 USD

View

Final sale: no returns

Retailer 13

$27,710 AUD

$19,465 USD

View

Price last confirmed 34 days ago

B+

Retailer 14

$28,085 AUD

$19,728 USD

View

Retailer 15

$28,099 AUD

$19,738 USD

View

Price last confirmed 29 days ago

Retailer 16

$28,099 AUD

$19,738 USD

View

Price last confirmed 22 days ago

B+

Retailer 17

$30,736 AUD

$21,590 USD

View

B+

Retailer 18

$31,027 AUD

£17,161 GBP

View

Retailer 19

$40,245 AUD

£22,260 GBP

View

Retailer 20

$44,136 AUD

£24,412 GBP

View

Retailer 21

$47,852 AUD

€32,013 EUR

View

Retailer 22

$48,675 AUD

View

Retailer 23

$50,774 AUD

$35,666 USD

View

Most Expensive

Cape Diamonds

cert_754595411 · Oct 29

$59,811 AUD

ZAR 678,742 ZAR

View

23 more retailers have this diamond

Prices start from $23,687 AUDSave up to $36,124 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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4.26ct Marquise

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