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Cushion|Lab Grown|IGI

1.51ct D IF Cushion Lab Grown Diamond

EX • D/IF • IGI LG728533556

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG728533556

Diamond specifications and retailer prices

From €459 EUR
As of November 4, 2026
Save €2,195 EUR (83%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: €2,654 EUR at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.51ct lab-grown cushion diamond

This 1.51ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG728533556 or 728533556. Listed at 20 retailers as of November 4, 2026, with prices from €459 to €2,654, a €2,195 spread on the same certified stone. Brilliant Earth lists it at €2,654. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle33.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG728533556
Dimensions6.54 × 6.41 × 4.14 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
6.54 mm6.41 mm1.51 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG728533556
Side View
Table 59.0%Crown 34°Girdle: MED-THKPavilion 33.6°Culet: NoneDepth 64.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: €2,654 EUR|Low: €459 EUR|High: €3,896 EUR|Avg: €1,415 EUR|-31.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
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Retailer 17
Retailer 18
Retailer 19
November 5, 2026
Retailer 17€459 EUR
Retailer 9€557 EUR
Retailer 8€643 EUR
Retailer 19€682 EUR
Retailer 4€771 EUR
Retailer 10€821 EUR
Retailer 12€833 EUR
Retailer 15€876 EUR
Retailer 16€946 EUR
Retailer 14€1,188 EUR
Retailer 13€1,290 EUR
Retailer 7€1,298 EUR
Retailer 5€1,571 EUR
Retailer 18€1,661 EUR
Retailer 3€1,801 EUR
Retailer 11€1,839 EUR
Retailer 2€1,862 EUR
Retailer 6€2,151 EUR
Brilliant Earth€2,654 EUR

37 data points across 19 retailers

20 retailers€459 EUR to €2,654 EUR

A
Cheapest Retailer
-
€459 EUR
Final sale: no returns
Retailer 2
-
€557 EUR
View
Price last confirmed 20 days ago
A
Retailer 3
-
€643 EUR
View
A
Retailer 4
-
€682 EUR
View
A
Retailer 5
-
€771 EUR
View
A
Retailer 6
-
€821 EUR
View
A
Retailer 7
-
€833 EUR
View
A
Retailer 8
-
€876 EUR
View
A
Retailer 9
-
€946 EUR
View
A
Retailer 10
-
€1,188 EUR
View
B+
Retailer 11
-
€1,290 EUR
View
B+
Retailer 12
-
€1,298 EUR
View
B+
Retailer 13
-
€1,571 EUR
View
B+
Retailer 14
-
€1,661 EUR
View
B+
Retailer 15
-
€1,801 EUR
View
Retailer 16
-
€1,839 EUR
View
Price last confirmed 25 days ago
B+
Retailer 17
-
€1,862 EUR
View
B
Retailer 18
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€2,151 EUR
View
Retailer 19
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€2,524 EUR
View
Price last confirmed 9 days ago
Most Expensive
B
Brilliant Earth
15509665A · Nov 4
€2,654 EUR
$2,990 USD
View
19 more retailers have this diamond
Prices start from €459 EURSave up to €2,195 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
1.51ct Cushion
€459 EUR