Cushion|Lab Grown|IGI

3.57ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG681578434

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

Certificate IGI LG681578434

Diamond specifications and retailer prices

From $2,278 USD

HK$17,800 HKD

As of October 30, 2026

Save $9,452 USD (81%) vs most expensive(unlock to see where)

19 retailers carry this diamond

Most expensive: $11,730 USD at Brilliant Earth · As of October 28, 2026

View at Brilliant Earth

About this 3.57ct lab-grown cushion diamond

This 3.57ct lab-grown cushion sits in the three to five carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG681578434 or 681578434. Listed at 19 retailers as of October 28, 2026, with prices from $2,278 to $11,730, a $9,452 spread on the same certified stone. Brilliant Earth lists it at $11,730. 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

3.57

Carat

Color

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle37°

Pavilion angle39.4°

OriginLab Grown

Grading LabIGI

CertificateIGI LG681578434

Dimensions8.94 × 8.92 × 5.90 mm

L/W Ratio1.00

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 LG681578434

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 30

Current: $11,730 USD|Low: $1,585 USD|High: $11,730 USD|Avg: $4,824 USD

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

Retailer 15

Retailer 16

Retailer 17

Retailer 18

Retailer 19

Retailer 20

October 22, 2026

Retailer 15$1,740 USD

Retailer 13$1,821 USD

Retailer 7$1,881 USD

Retailer 8$2,278 USD

Retailer 14$2,603 USD

Retailer 4$2,728 USD

Retailer 18$2,858 USD

Retailer 19$3,382 USD

Retailer 2$4,098 USD

Retailer 16$4,161 USD

Retailer 11$4,374 USD

Retailer 9$4,712 USD

Retailer 5$5,015 USD

Retailer 20$5,202 USD

Retailer 17$5,535 USD

Retailer 12$6,394 USD

Retailer 10$6,578 USD

Retailer 3$9,474 USD

Retailer 6$9,740 USD

Brilliant Earth$11,730 USD

30 data points across 20 retailers

19 retailers$2,278 USD to $11,730 USD

Retailer 1

$1,740 USD

Price last confirmed 7 days ago

Retailer 2

$1,881 USD

View

Price last confirmed 8 days ago

Retailer 3

$2,278 USD

HK$17,800 HKD

View

Retailer 4

$2,603 USD

£2,050 GBP

View

Price last confirmed 8 days ago

Retailer 5

$2,630 USD

£2,071 GBP

View

Price last confirmed 14 days ago

Retailer 6

$2,728 USD

View

Price last confirmed 11 days ago

Retailer 7

$3,382 USD

View

Retailer 8

$4,098 USD

A$6,305 AUD

View

Price last confirmed 7 days ago

Retailer 9

$4,161 USD

ZAR 67,225 ZAR

View

Price last confirmed 10 days ago

Retailer 10

$4,374 USD

£3,444 GBP

View

Price last confirmed 8 days ago

Retailer 11

$4,712 USD

View

Price last confirmed 8 days ago

Retailer 12

$5,015 USD

View

Price last confirmed 9 days ago

Retailer 13

$5,202 USD

£4,096 GBP

View

Price last confirmed 9 days ago

Retailer 14

$5,535 USD

View

Price last confirmed 8 days ago

Retailer 15

$6,394 USD

View

Price last confirmed 8 days ago

Retailer 16

$6,578 USD

SGD 8,889 SGD

View

Price last confirmed 9 days ago

Retailer 17

$9,474 USD

A$14,575 AUD

View

Price last confirmed 21 days ago

Retailer 18

$9,740 USD

View

Price last confirmed 7 days ago

Most Expensive

Brilliant Earth

13509362Y · Oct 28

$11,730 USD

View

18 more retailers have this diamond

Prices start from $2,278 USDSave up to $9,452 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.

Similar diamonds

3.57ct Cushion

$2,278 USD