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Cushion|Lab Grown|IGI

1.50ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG523299010

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG523299010

Diamond specifications and retailer prices

From $206 USD
As of November 6, 2026
Save $939 USD (82%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,145 USD at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

About this 1.5ct lab-grown cushion diamond

This 1.5ct lab-grown cushion sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG523299010 or 523299010. Listed at 13 retailers as of November 6, 2026, with prices from $206 to $1,145, a $939 spread on the same certified stone. Reve Diamonds lists it at $1,145. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.50
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle36.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG523299010
Dimensions6.60 × 6.36 × 4.22 mm
L/W Ratio1.04
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
6.60 mm6.36 mm1.50 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG523299010
Side View
Table 63.0%Crown 33.7°Girdle: MED-THKPavilion 36.9°Culet: NoneDepth 66.4%

Caratlytics Score

How it works →
A
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: Nov 6
Current: $375 USD|Low: $206 USD|High: $1,290 USD|Avg: $543 USD|-5.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 10$206 USD
Retailer 8$229 USD
Retailer 7$310 USD
Retailer 1$375 USD
Retailer 3$408 USD
Retailer 2$455 USD
Retailer 5$545 USD
Retailer 9$562 USD
Retailer 4$1,070 USD
Retailer 6$1,110 USD

44 data points across 10 retailers

13 retailers$206 USD to $1,145 USD

A
Cheapest Retailer
-
$206 USD
Final sale: no returns
Retailer 2
-
$229 USD
View
Price last confirmed 12 days ago
B+
Retailer 3
-
$310 USD
View
A
Retailer 4
-
$375 USD
View
A
Retailer 5
-
$408 USD
View
A
Retailer 6
-
$445 USD
View
A
Retailer 7
-
$455 USD
View
A
Retailer 8
-
$545 USD
View
B+
Retailer 9
-
$562 USD
View
B
Retailer 10
-
$790 USD
View
B
Retailer 11
-
$1,070 USD
View
B
Retailer 12
-
$1,110 USD
View
Most Expensive
B
Reve Diamonds
CF8011C43 · Nov 6
$1,145 USD
View
12 more retailers have this diamond
Prices start from $206 USDSave up to $939 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
1.50ct Cushion
$206 USD