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Cushion|Lab Grown|IGI

1.51ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG626419440

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG626419440

Diamond specifications and retailer prices

From $490 USD
As of October 28, 2026
Save $2,370 USD (83%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $2,860 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.51ct lab-grown cushion diamond

This 1.51ct lab-grown cushion sits in the one-and-a-half to two carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG626419440 or 626419440. Listed at 8 retailers as of October 28, 2026, with prices from $490 to $2,860, a $2,370 spread on the same certified stone. Brilliant Earth lists it at $2,860. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
E
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG626419440
Dimensions6.66 × 6.64 × 4.48 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
Top View
6.66 mm6.64 mm1.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG626419440
Side View
Table 60.0%Crown 36.1°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 67.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 28
Current: $2,860 USD|Low: $490 USD|High: $5,063 USD|Avg: $1,536 USD|-3.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 19, 2026
Retailer 6$490 USD
Retailer 8$730 USD
Retailer 3$730 USD
Retailer 7$836 USD
Retailer 4$1,552 USD
Retailer 5$2,105 USD
Retailer 2$2,180 USD
Brilliant Earth$2,860 USD

11 data points across 8 retailers

8 retailers$490 USD to $2,860 USD

A
Cheapest Retailer
-
$490 USD
Final sale: no returns
A
Retailer 2
-
$730 USD
HK$5,700 HKD
View
A
Retailer 3
-
$730 USD
View
A
Retailer 4
-
$836 USD
View
Retailer 5
-
$1,552 USD
A$2,387 AUD
View
Price last confirmed 21 days ago
B+
Retailer 6
-
$2,105 USD
SGD 2,845 SGD
View
Retailer 7
-
$2,180 USD
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
15233891Y · Oct 29
$2,860 USD
View
7 more retailers have this diamond
Prices start from $490 USDSave up to $2,370 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.

A
1.51ct Cushion
$490 USD