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Cushion|Lab Grown|IGI

1.50ct D IF Cushion Lab Grown Diamond

ID • D/IF • IGI LG665408906

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG665408906

Diamond specifications and retailer prices

From $651 USD
As of October 31, 2026
Save $3,719 USD (85%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $4,370 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

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 D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG665408906 or 665408906. Listed at 20 retailers as of October 29, 2026, with prices from $651 to $4,370, a $3,719 spread on the same certified stone. Brilliant Earth lists it at $4,370. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.50
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle37.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG665408906
Dimensions7.79 × 6.13 × 4.08 mm
L/W Ratio1.27
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
7.79 mm6.13 mm1.50 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG665408906
Side View
Table 62.0%Crown 35.9°Girdle: MED-THKPavilion 37.4°Culet: NoneDepth 66.6%

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: Oct 31
Current: $4,370 USD|Low: $644 USD|High: $4,370 USD|Avg: $1,750 USD|+0.2%
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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
October 31, 2026
Retailer 15$651 USD
Retailer 5$721 USD
Retailer 17$850 USD
Retailer 4$933 USD
Retailer 3$1,094 USD
Retailer 6$1,108 USD
Retailer 13$1,126 USD
Retailer 16$1,239 USD
Retailer 14$1,269 USD
Retailer 7$1,638 USD
Retailer 12$1,680 USD
Retailer 10$2,103 USD
Retailer 11$2,292 USD
Retailer 9$2,334 USD
Retailer 2$2,410 USD
Retailer 8$2,411 USD
Retailer 18$2,670 USD
Retailer 19$3,147 USD
Brilliant Earth$4,370 USD

37 data points across 19 retailers

20 retailers$651 USD to $4,370 USD

A
Cheapest Retailer
-
$651 USD
Final sale: no returns
Retailer 2
-
$721 USD
View
Price last confirmed 15 days ago
A
Retailer 3
-
$850 USD
View
A
Retailer 4
-
$933 USD
View
A
Retailer 5
-
$1,094 USD
View
A
Retailer 6
-
$1,108 USD
View
A
Retailer 7
-
$1,126 USD
£887 GBP
View
A
Retailer 8
-
$1,239 USD
ZAR 20,017 ZAR
View
A
Retailer 9
-
$1,269 USD
€1,209 EUR
View
B+
Retailer 10
-
$1,638 USD
View
B+
Retailer 11
-
$1,680 USD
A$2,584 AUD
View
B+
Retailer 12
-
$2,103 USD
£1,656 GBP
View
B+
Retailer 13
-
$2,292 USD
View
B+
Retailer 14
-
$2,334 USD
View
B+
Retailer 15
-
$2,410 USD
A$3,707 AUD
View
B
Retailer 16
-
$2,411 USD
View
Retailer 17
-
$2,670 USD
View
Price last confirmed 12 days ago
B
Retailer 18
-
$3,147 USD
£2,478 GBP
View
B
Retailer 19
-
$3,334 USD
View
Most Expensive
B
Brilliant Earth
14720158A · Oct 29
$4,370 USD
View
19 more retailers have this diamond
Prices start from $651 USDSave up to $3,719 USD

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
$651 USD