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Cushion|Lab Grown|IGI

1.51ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG799648217

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG799648217

Diamond specifications and retailer prices

From $564 USD
As of October 31, 2026
Save $3,056 USD (84%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $3,620 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 LG799648217 or 799648217. Listed at 18 retailers as of October 31, 2026, with prices from $564 to $3,620, a $3,056 spread on the same certified stone. Brilliant Earth lists it at $3,620. 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 angle34.2°
Pavilion angle33.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG799648217
Dimensions8.54 × 5.73 × 3.85 mm
L/W Ratio1.49
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
8.54 mm5.73 mm1.51 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG799648217
Side View
Table 63.0%Crown 34.2°Girdle: MED-STKPavilion 33.5°Culet: NoneDepth 67.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 31
Current: $3,620 USD|Low: $564 USD|High: $4,840 USD|Avg: $1,700 USD|-25.2%
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
November 1, 2026
Retailer 4$564 USD
Retailer 9$685 USD
Retailer 12$765 USD
Retailer 3$847 USD
Retailer 11$936 USD
Retailer 5$971 USD
Retailer 10$1,041 USD
Retailer 13$1,075 USD
Retailer 15$1,079 USD
Retailer 6$1,457 USD
Retailer 17$1,829 USD
Retailer 7$2,036 USD
Retailer 16$2,036 USD
Retailer 14$2,247 USD
Retailer 2$2,611 USD
Retailer 8$2,675 USD
Brilliant Earth$3,620 USD

27 data points across 17 retailers

18 retailers$564 USD to $3,620 USD

A
Cheapest Retailer
-
$564 USD
Final sale: no returns
Retailer 2
-
$685 USD
View
Price last confirmed 16 days ago
A
Retailer 3
-
$765 USD
View
A
Retailer 4
-
$847 USD
View
A
Retailer 5
-
$936 USD
€891 EUR
View
A
Retailer 6
-
$971 USD
View
A
Retailer 7
-
$1,041 USD
£820 GBP
View
A
Retailer 8
-
$1,075 USD
ZAR 17,364 ZAR
View
A
Retailer 9
-
$1,079 USD
View
A
Retailer 10
-
$1,457 USD
View
B+
Retailer 11
-
$1,829 USD
£1,440 GBP
View
B+
Retailer 12
-
$2,036 USD
SGD 2,751 SGD
View
B+
Retailer 13
-
$2,036 USD
View
B+
Retailer 14
-
$2,195 USD
View
B+
Retailer 15
-
$2,247 USD
View
B+
Retailer 16
-
$2,611 USD
£2,056 GBP
View
Retailer 17
-
$2,675 USD
View
Price last confirmed 11 days ago
Most Expensive
B
Brilliant Earth
21420547A · Oct 31
$3,620 USD
View
17 more retailers have this diamond
Prices start from $564 USDSave up to $3,056 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
$564 USD