Cushion|Lab Grown|IGI

4.09ct F VS1 Cushion Lab Grown Diamond

EX • F/VS1 • IGI LG816617452

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG816617452

Diamond specifications and retailer prices

From $937 NZD

£415 GBP

As of November 2, 2026

Save $6,741 NZD (88%) vs most expensive(unlock to see where)

14 retailers carry this diamond

Most expensive: $7,678 NZD at Brilliant Earth · As of November 2, 2026

View at Brilliant Earth

About this 4.09ct lab-grown cushion diamond

This 4.09ct lab-grown cushion sits in the three to five carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG816617452 or 816617452. Listed at 14 retailers as of November 2, 2026, with prices from $937 to $7,678, a $6,741 spread on the same certified stone. Brilliant Earth lists it at $7,678. 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

4.09

Carat

Colour

VS1

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle45.7°

Pavilion angle30.3°

OriginLab Grown

Grading LabIGI

CertificateIGI LG816617452

Dimensions9.06 × 8.52 × 5.71 mm

L/W Ratio1.06

Girdle conditionFaceted

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 LG816617452

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: $7,678 NZD|Low: $937 NZD|High: $13,241 NZD|Avg: $3,665 NZD|-42.0%

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

November 2, 2026

Retailer 2$937 NZD

Retailer 11$1,369 NZD

Retailer 3$1,507 NZD

Retailer 8$1,709 NZD

Retailer 12$1,832 NZD

Retailer 7$1,871 NZD

Retailer 10$2,250 NZD

Retailer 14$2,803 NZD

Retailer 13$3,555 NZD

Retailer 4$3,655 NZD

Retailer 9$3,923 NZD

Retailer 5$4,751 NZD

Retailer 6$5,483 NZD

Brilliant Earth$7,678 NZD

42 data points across 14 retailers

14 retailers$937 NZD to $7,678 NZD

Cheapest Retailer

$937 NZD

£415 GBP

Retailer 2

$1,369 NZD

$770 USD

View

B+

Retailer 3

$1,507 NZD

$848 USD

View

Retailer 4

$1,709 NZD

€916 EUR

View

Retailer 5

$1,832 NZD

$1,031 USD

View

Retailer 6

$1,871 NZD

£829 GBP

View

Retailer 7

$2,250 NZD

A$1,948 AUD

View

Retailer 8

$2,803 NZD

$1,577 USD

View

B+

Retailer 9

$3,555 NZD

SGD 2,703 SGD

View

B+

Retailer 10

$3,655 NZD

$2,056 USD

View

B+

Retailer 11

$3,923 NZD

$2,207 USD

View

B+

Retailer 12

$4,751 NZD

£2,105 GBP

View

Retailer 13

$5,483 NZD

$3,085 USD

View

Price last confirmed 25 days ago

Most Expensive

Brilliant Earth

22374626A · Nov 2

$7,678 NZD

$4,320 USD

View

13 more retailers have this diamond

Prices start from $937 NZDSave up to $6,741 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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