Cushion|Lab Grown|IGI

1.51ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG816683635

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG816683635

Diamond specifications and retailer prices

From $395 USD
As of October 30, 2026
Save $3,085 USD (89%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $3,480 USD at Brilliant Earth · As of October 29, 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 E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG816683635 or 816683635. Listed at 19 retailers as of October 29, 2026, with prices from $395 to $3,480, a $3,085 spread on the same certified stone. Brilliant Earth lists it at $3,480. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
E
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.7°
Pavilion angle33.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816683635
Dimensions8.09 × 5.81 × 3.84 mm
L/W Ratio1.39
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
8.09 mm5.81 mm1.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816683635
Side View
Table 57.0%Crown 32.7°Girdle: STK-THKPavilion 33.9°Culet: NoneDepth 66.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: $3,480 USD|Low: $395 USD|High: $3,480 USD|Avg: $1,181 USD
Brilliant Earth
Retailer 2
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Retailer 11
Retailer 12
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Retailer 19
October 30, 2026
Retailer 5$395 USD
Retailer 6$438 USD
Retailer 2$452 USD
Retailer 16$515 USD
Retailer 11$685 USD
Retailer 8$692 USD
Retailer 13$699 USD
Retailer 15$752 USD
Retailer 12$787 USD
Retailer 14$1,016 USD
Retailer 7$1,034 USD
Retailer 9$1,448 USD
Retailer 3$1,545 USD
Retailer 10$1,552 USD
Retailer 19$1,622 USD
Retailer 18$1,682 USD
Retailer 4$1,720 USD
Retailer 17$2,340 USD
Brilliant Earth$3,480 USD

41 data points across 19 retailers

19 retailers$395 USD to $3,480 USD

A
Cheapest Retailer
-
$395 USD
Final sale: no returns
A
Retailer 2
-
$438 USD
View
A
Retailer 3
-
$452 USD
£356 GBP
View
A
Retailer 4
-
$515 USD
View
A
Retailer 5
-
$685 USD
View
A
Retailer 6
-
$692 USD
View
A
Retailer 7
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$699 USD
€666 EUR
View
A
Retailer 8
-
$752 USD
ZAR 12,149 ZAR
View
A
Retailer 9
-
$787 USD
£620 GBP
View
A
Retailer 10
-
$1,016 USD
A$1,563 AUD
View
A
Retailer 11
-
$1,034 USD
View
A
Retailer 12
-
$1,448 USD
View
B+
Retailer 13
-
$1,545 USD
View
Retailer 14
-
$1,552 USD
A$2,387 AUD
View
Price last confirmed 22 days ago
B+
Retailer 15
-
$1,622 USD
SGD 2,192 SGD
View
B+
Retailer 16
-
$1,682 USD
View
B+
Retailer 17
-
$1,720 USD
£1,354 GBP
View
Retailer 18
-
$2,340 USD
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
22183635A · Oct 29
$3,480 USD
View
18 more retailers have this diamond
Prices start from $395 USDSave up to $3,085 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
$395 USD