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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 $260 SGD
$203 USD
As of November 1, 2026
Save $1,191 SGD (82%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,450 SGD at Reve Diamonds · As of November 1, 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 1, 2026, with prices from $260 to $1,450, a $1,191 spread on the same certified stone. Reve Diamonds lists it at $1,450. 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

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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 1
Current: $518 SGD|Low: $260 SGD|High: $1,450 SGD|Avg: $747 SGD|+4.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Reve Diamonds
November 3, 2026
Retailer 3$260 SGD
Retailer 8$288 SGD
Retailer 10$407 SGD
Retailer 5$494 SGD
Retailer 1$518 SGD
Retailer 9$577 SGD
Retailer 2$601 SGD
Retailer 11$715 SGD
Retailer 6$719 SGD
Retailer 7$1,164 SGD
Retailer 4$1,345 SGD
Reve Diamonds$1,450 SGD

37 data points across 12 retailers

13 retailers$260 SGD to $1,450 SGD

A
Cheapest Retailer
-
$260 SGD
$203 USD
Final sale: no returns
Retailer 2
-
$288 SGD
$225 USD
View
Price last confirmed 22 days ago
B+
Retailer 3
-
$407 SGD
$318 USD
View
A
Retailer 4
-
$494 SGD
€368 EUR
View
A
Retailer 5
-
$518 SGD
£319 GBP
View
A
Retailer 6
-
$577 SGD
$451 USD
View
A
Retailer 7
-
$601 SGD
$470 USD
View
A
Retailer 8
-
$715 SGD
$559 USD
View
A
Retailer 9
-
$719 SGD
$562 USD
View
B+
Retailer 10
-
$994 SGD
$777 USD
View
B
Retailer 11
-
$1,164 SGD
$910 USD
View
B
Retailer 12
-
$1,345 SGD
£828 GBP
View
Most Expensive
B
Reve Diamonds
1116C6968 · Nov 1
$1,450 SGD
$1,134 USD
View
12 more retailers have this diamond
Prices start from $260 SGDSave up to $1,191 SGD

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
$260 SGD