Cushion|Lab Grown|IGI

1.78ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG833637805

Shape and cutting style on the report: Square cushion antique cut

Certificate IGI LG833637805

Diamond specifications and retailer prices

From $1,355 USD

As of October 29, 2026

Save $2,882 USD (68%) vs most expensive(unlock to see where)

17 retailers carry this diamond

Most expensive: $4,237 USD at Taylor and Hart · As of October 30, 2026

View at Taylor and Hart

About this 1.78ct lab-grown cushion diamond

This 1.78ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG833637805 or 833637805. Listed at 17 retailers as of October 29, 2026, with prices from $1,355 to $4,237, a $2,882 spread on the same certified stone. Taylor and Hart lists it at $4,237. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.78

Carat

Color

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle36.3°

Pavilion angle40.1°

OriginLab Grown

Grading LabIGI

CertificateIGI LG833637805

Dimensions7.51 × 7.24 × 4.53 mm

L/W Ratio1.04

Girdle conditionFaceted

Culet sizeLarge

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 LG833637805

Side View

Caratlytics Score

How it works →

Excellent

Excellent quality and great value

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

Price History

Last verified: Oct 29

Current: $1,757 USD|Low: $900 USD|High: $4,237 USD|Avg: $2,709 USD|-0.8%

Retailer 1

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Taylor and Hart

October 30, 2026

Retailer 3$1,355 USD

Retailer 9$1,377 USD

Retailer 10$1,610 USD

Retailer 1$1,757 USD

Retailer 6$2,075 USD

Retailer 7$2,536 USD

Retailer 5$3,260 USD

Retailer 8$3,353 USD

Retailer 2$3,894 USD

Retailer 4$4,138 USD

Taylor and Hart$4,237 USD

40 data points across 11 retailers

17 retailers$1,355 USD to $4,237 USD

Retailer 1

$1,046 USD

Price last confirmed 37 days ago

Retailer 2

$1,046 USD

View

Price last confirmed 20 days ago

Retailer 3

$1,197 USD

View

Price last confirmed 37 days ago

Retailer 4

$1,214 USD

View

Price last confirmed 28 days ago

Retailer 5

$1,214 USD

View

Price last confirmed 18 days ago

Retailer 6

$1,355 USD

View

Retailer 7

$1,377 USD

View

Final sale: no returns

Retailer 8

$1,610 USD

View

B+

Retailer 9

$1,757 USD

£1,383 GBP

View

B+

Retailer 10

$2,075 USD

View

Retailer 11

$2,275 USD

View

Price last confirmed 23 days ago

B+

Retailer 12

$2,536 USD

View

Retailer 13

$3,260 USD

View

Retailer 14

$3,353 USD

£2,640 GBP

View

Retailer 15

$3,894 USD

View

Retailer 16

$4,138 USD

£3,258 GBP

View

Most Expensive

Taylor and Hart

9GF9QRZ · Oct 30

$4,237 USD

View

16 more retailers have this diamond

Prices start from $1,355 USDSave up to $2,882 USD

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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