Cushion|Lab Grown|IGI

1.51ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG804658152

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG804658152

Diamond specifications and retailer prices

From $549 USD
As of October 31, 2026
Save $2,921 USD (84%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $3,470 USD at Brilliant Earth · As of October 31, 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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG804658152 or 804658152. Listed at 19 retailers as of October 31, 2026, with prices from $549 to $3,470, a $2,921 spread on the same certified stone. Brilliant Earth lists it at $3,470. 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
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle33.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG804658152
Dimensions8.29 × 5.70 × 3.85 mm
L/W Ratio1.45
Girdle conditionFaceted
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
8.29 mm5.70 mm1.51 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG804658152
Side View
Table 61.0%Crown 34.3°Girdle: MED-THKPavilion 33.9°Culet: NoneDepth 67.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 31
Current: $3,470 USD|Low: $549 USD|High: $4,830 USD|Avg: $1,596 USD|-28.2%
Brilliant Earth
Retailer 2
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Retailer 7
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Retailer 10
Retailer 11
Retailer 12
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Retailer 18
November 1, 2026
Retailer 4$549 USD
Retailer 2$644 USD
Retailer 10$652 USD
Retailer 3$842 USD
Retailer 12$911 USD
Retailer 14$920 USD
Retailer 5$948 USD
Retailer 11$1,012 USD
Retailer 13$1,046 USD
Retailer 16$1,074 USD
Retailer 7$1,418 USD
Retailer 18$1,768 USD
Retailer 17$1,984 USD
Retailer 8$1,989 USD
Retailer 6$2,195 USD
Retailer 15$2,544 USD
Retailer 9$2,675 USD
Brilliant Earth$3,470 USD

26 data points across 18 retailers

19 retailers$549 USD to $3,470 USD

A
Cheapest Retailer
-
$549 USD
Final sale: no returns
A
Retailer 2
-
$644 USD
£507 GBP
View
Retailer 3
-
$652 USD
View
Price last confirmed 15 days ago
A
Retailer 4
-
$842 USD
View
A
Retailer 5
-
$911 USD
€868 EUR
View
A
Retailer 6
-
$920 USD
View
A
Retailer 7
-
$948 USD
View
A
Retailer 8
-
$1,012 USD
£797 GBP
View
A
Retailer 9
-
$1,046 USD
ZAR 16,896 ZAR
View
A
Retailer 10
-
$1,074 USD
View
A
Retailer 11
-
$1,418 USD
View
B+
Retailer 12
-
$1,768 USD
£1,392 GBP
View
B+
Retailer 13
-
$1,984 USD
View
B+
Retailer 14
-
$1,989 USD
SGD 2,688 SGD
View
B+
Retailer 15
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$2,132 USD
View
B+
Retailer 16
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$2,195 USD
View
B+
Retailer 17
-
$2,544 USD
£2,003 GBP
View
Retailer 18
-
$2,675 USD
View
Price last confirmed 10 days ago
Most Expensive
B
Brilliant Earth
21420935A · Oct 31
$3,470 USD
View
18 more retailers have this diamond
Prices start from $549 USDSave up to $2,921 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
1.51ct Cushion
$549 USD