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Cushion|Lab Grown|IGI

1.50ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG522251870

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG522251870

Diamond specifications and retailer prices

From $300 AUD
As of November 5, 2026
Save $1,366 AUD (82%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,665 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG522251870 or 522251870. Listed at 13 retailers as of November 5, 2026, with prices from $300 to $1,665, a $1,366 spread on the same certified stone. Reve Diamonds lists it at $1,665. 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
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.6°
Pavilion angle33.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG522251870
Dimensions6.62 × 6.47 × 4.11 mm
L/W Ratio1.02
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
6.62 mm6.47 mm1.50 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG522251870
Side View
Table 64.5%Crown 36.6°Girdle: MED-VTKPavilion 33.6°Culet: NoneDepth 63.5%

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 5
Current: $566 AUD|Low: $295 AUD|High: $1,665 AUD|Avg: $769 AUD|+4.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Reve Diamonds
November 6, 2026
Retailer 8$300 AUD
Retailer 12$327 AUD
Retailer 2$463 AUD
Retailer 1$566 AUD
Retailer 6$594 AUD
Retailer 5$658 AUD
Retailer 4$684 AUD
Retailer 3$814 AUD
Retailer 11$818 AUD
Retailer 10$1,148 AUD
Retailer 7$1,339 AUD
Retailer 9$1,551 AUD
Reve Diamonds$1,665 AUD

36 data points across 13 retailers

13 retailers$300 AUD to $1,665 AUD

A
Cheapest Retailer
-
$300 AUD
Final sale: no returns
Retailer 2
-
$327 AUD
View
Price last confirmed 26 days ago
B+
Retailer 3
-
$463 AUD
View
A
Retailer 4
-
$566 AUD
View
A
Retailer 5
-
$594 AUD
View
A
Retailer 6
-
$658 AUD
View
A
Retailer 7
-
$684 AUD
View
A
Retailer 8
-
$814 AUD
View
A
Retailer 9
-
$818 AUD
View
B+
Retailer 10
-
$1,148 AUD
View
B
Retailer 11
-
$1,339 AUD
View
B
Retailer 12
-
$1,551 AUD
View
Most Expensive
B
Reve Diamonds
1116C6968 · Nov 6
$1,665 AUD
$1,144 USD
View
12 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