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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 $300 AUD
As of November 6, 2026
Save $1,366 AUD (82%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,666 AUD 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 15 retailers as of November 6, 2026, with prices from $300 to $1,666, a $1,366 spread on the same certified stone. Reve Diamonds lists it at $1,666. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $766 AUD|Low: $300 AUD|High: $1,877 AUD|Avg: $788 AUD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 7, 2026
Retailer 3$300 AUD
Retailer 12$333 AUD
Retailer 11$451 AUD
Retailer 7$546 AUD
Retailer 6$597 AUD
Retailer 4$662 AUD
Retailer 1$766 AUD
Retailer 9$793 AUD
Retailer 2$818 AUD
Retailer 5$1,237 AUD
Retailer 8$1,557 AUD
Retailer 10$1,615 AUD

44 data points across 12 retailers

15 retailers$300 AUD to $1,666 AUD

A
Cheapest Retailer
-
$300 AUD
Final sale: no returns
A
Retailer 2
-
$333 AUD
View
B+
Retailer 3
-
$451 AUD
View
A
Retailer 4
-
$546 AUD
View
A
Retailer 5
-
$597 AUD
View
A
Retailer 6
-
$648 AUD
View
A
Retailer 7
-
$662 AUD
View
A
Retailer 8
-
$766 AUD
View
A
Retailer 9
-
$793 AUD
View
B+
Retailer 10
-
$818 AUD
View
B
Retailer 11
-
$1,150 AUD
View
B+
Retailer 12
-
$1,237 AUD
View
B
Retailer 13
-
$1,557 AUD
View
B
Retailer 14
-
$1,615 AUD
View
Most Expensive
B
Reve Diamonds
CF8011C43 · Nov 6
$1,666 AUD
$1,145 USD
View
14 more retailers have this diamond
Prices start from $300 AUDSave up to $1,366 AUD

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
$300 AUD