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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 €181 EUR
$203 USD
As of November 1, 2026
Save €830 EUR (82%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €1,011 EUR 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 €181 to €1,011, a €830 spread on the same certified stone. Reve Diamonds lists it at €1,011. 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
Color
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: €361 EUR|Low: €181 EUR|High: €1,011 EUR|Avg: €521 EUR|+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€181 EUR
Retailer 8€201 EUR
Retailer 10€284 EUR
Retailer 5€345 EUR
Retailer 1€361 EUR
Retailer 9€402 EUR
Retailer 2€419 EUR
Retailer 11€498 EUR
Retailer 6€501 EUR
Retailer 7€811 EUR
Retailer 4€938 EUR
Reve Diamonds€1,011 EUR

37 data points across 12 retailers

13 retailers€181 EUR to €1,011 EUR

A
Cheapest Retailer
-
€181 EUR
$203 USD
Final sale: no returns
Retailer 2
-
€201 EUR
$225 USD
View
Price last confirmed 21 days ago
B+
Retailer 3
-
€284 EUR
$318 USD
View
A
Retailer 4
-
€345 EUR
View
A
Retailer 5
-
€361 EUR
£319 GBP
View
A
Retailer 6
-
€402 EUR
$451 USD
View
A
Retailer 7
-
€419 EUR
$470 USD
View
A
Retailer 8
-
€498 EUR
$559 USD
View
A
Retailer 9
-
€501 EUR
$562 USD
View
B+
Retailer 10
-
€693 EUR
$777 USD
View
B
Retailer 11
-
€811 EUR
$910 USD
View
B
Retailer 12
-
€938 EUR
£828 GBP
View
Most Expensive
B
Reve Diamonds
1116C6968 · Nov 1
€1,011 EUR
$1,134 USD
View
12 more retailers have this diamond
Prices start from €181 EURSave up to €830 EUR

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
€181 EUR