Cushion|Lab Grown|IGI

1.29ct D IF Cushion Lab Grown Diamond

ID • D/IF • IGI LG685521998

Certificate IGI LG685521998

Diamond specifications and retailer prices

This diamond has been sold

Last seen: Aug 8, 2026 at $932 USD

$932 USDlast known price

About this 1.29ct lab-grown cushion diamond

This 1.29ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG685521998 or 685521998. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.29

Carat

Color

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle37.7°

Pavilion angle43.4°

OriginLab Grown

Grading LabIGI

CertificateIGI LG685521998

Dimensions6.28 × 6.23 × 4.24 mm

L/W Ratio1.01

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 LG685521998

Side View

Caratlytics Score

Price History

Last verified: Aug 8

Current: $1,089 USD|Low: $363 USD|High: $3,862 USD|Avg: $2,042 USD|-48.1%

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Historical Listings

Best Price

William & Sons Jewelers

cert_LG685521998 · Aug 7

$363 USD