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Cushion|Lab Grown|IGI

1.51ct F IF Cushion Lab Grown Diamond

ID • F/IF • IGI LG825633151

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

Certificate IGI LG825633151

Diamond specifications and retailer prices

From $385 USD
As of November 4, 2026
Save $1,825 USD (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $2,210 USD 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 F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG825633151 or 825633151. Listed at 14 retailers as of November 4, 2026, with prices from $385 to $2,210, a $1,825 spread on the same certified stone. Brilliant Earth lists it at $2,210. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
F
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle42°
OriginLab Grown
Grading LabIGI
CertificateIGI LG825633151
Dimensions6.58 × 6.49 × 4.49 mm
L/W Ratio1.01
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
6.58 mm6.49 mm1.51 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG825633151
Side View
Table 65.0%Crown 35.1°Girdle: STK-THKPavilion 42°Culet: NoneDepth 69.2%

Caratlytics Score

How it works →
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 4
Current: $385 USD|Low: $385 USD|High: $1,820 USD|Avg: $1,014 USD|-0.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 4, 2026
Retailer 1$385 USD
Retailer 12$502 USD
Retailer 11$530 USD
Retailer 9$647 USD
Retailer 6$660 USD
Retailer 8$662 USD
Retailer 3$709 USD
Retailer 7$880 USD
Retailer 4$1,006 USD
Retailer 5$1,254 USD
Retailer 13$1,443 USD
Retailer 10$1,504 USD
Retailer 2$1,815 USD

40 data points across 13 retailers

14 retailers$385 USD to $2,210 USD

A
Cheapest Retailer
-
$385 USD
A
Retailer 2
-
$502 USD
View
A
Retailer 3
-
$530 USD
View
A
Retailer 4
-
$647 USD
View
A
Retailer 5
-
$660 USD
View
A
Retailer 6
-
$662 USD
View
A
Retailer 7
-
$709 USD
View
A
Retailer 8
-
$880 USD
View
A
Retailer 9
-
$1,006 USD
View
A
Retailer 10
-
$1,254 USD
View
B+
Retailer 11
-
$1,443 USD
View
A
Retailer 12
-
$1,504 USD
View
Retailer 13
-
$1,815 USD
View
Price last confirmed 16 days ago
Most Expensive
B+
Brilliant Earth
22411700A · Nov 4
$2,210 USD
View
13 more retailers have this diamond
Prices start from $385 USDSave up to $1,825 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
$385 USD