Cushion|Lab Grown|IGI

4.28ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG762545820

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG762545820

Diamond specifications and retailer prices

From $6,521 CAD

$4,668 USD

As of October 29, 2026

Save $23,015 CAD (78%) vs most expensive(unlock to see where)

14 retailers carry this diamond

Most expensive: $29,536 CAD at Blue Nile · As of October 29, 2026

View at Blue Nile

About this 4.28ct lab-grown cushion diamond

This 4.28ct lab-grown cushion sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG762545820 or 762545820. Listed at 14 retailers as of October 29, 2026, with prices from $6,521 to $29,536, a $23,015 spread on the same certified stone. Blue Nile lists it at $29,536. 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

4.28

Carat

Color

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle33.2°

Pavilion angle35.3°

OriginLab Grown

Grading LabIGI

CertificateIGI LG762545820

Dimensions10.79 × 8.75 × 5.75 mm

L/W Ratio1.23

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

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG762545820

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: $29,536 CAD|Low: $6,521 CAD|High: $31,402 CAD|Avg: $15,745 CAD|+59.0%

Blue Nile

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

October 30, 2026

Retailer 13$6,521 CAD

Retailer 14$6,641 CAD

Retailer 10$9,012 CAD

Retailer 7$9,243 CAD

Retailer 5$11,406 CAD

Retailer 11$11,715 CAD

Retailer 6$12,027 CAD

Retailer 3$12,920 CAD

Retailer 9$15,170 CAD

Retailer 12$15,825 CAD

Retailer 2$18,523 CAD

Retailer 4$20,519 CAD

Retailer 8$25,427 CAD

Blue Nile$29,536 CAD

39 data points across 14 retailers

14 retailers$6,521 CAD to $29,536 CAD

Cheapest Retailer

$6,521 CAD

$4,668 USD

Retailer 2

$6,641 CAD

$4,754 USD

View

Retailer 3

$9,012 CAD

HK$50,400 HKD

View

Retailer 4

$9,243 CAD

£5,210 GBP

View

Retailer 5

$11,406 CAD

$8,165 USD

View

Price last confirmed 11 days ago

Retailer 6

$11,715 CAD

€7,987 EUR

View

B+

Retailer 7

$12,027 CAD

$8,610 USD

View

B+

Retailer 8

$12,920 CAD

$9,249 USD

View

B+

Retailer 9

$15,170 CAD

ZAR 175,446 ZAR

View

B+

Retailer 10

$15,825 CAD

£8,920 GBP

View

B+

Retailer 11

$18,523 CAD

$13,260 USD

View

B+

Retailer 12

$20,519 CAD

$14,689 USD

View

B+

Retailer 13

$25,427 CAD

$18,203 USD

View

Most Expensive

Blue Nile

29977365 · Oct 29

$29,536 CAD

$21,144 USD

View

13 more retailers have this diamond

Prices start from $6,521 CADSave up to $23,015 CAD

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.

Similar diamonds

4.28ct Cushion

$6,521 CAD