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Cushion|Lab Grown|IGI

1.51ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG770641066

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG770641066

Diamond specifications and retailer prices

From $449 USD
As of October 30, 2026
Save $3,031 USD (87%) 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 LG770641066 or 770641066. Listed at 19 retailers as of October 29, 2026, with prices from $449 to $3,480, a $3,031 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
SymmetryVery Good
FluorescenceNone
Crown angle38.6°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG770641066
Dimensions7.11 × 6.87 × 4.30 mm
L/W Ratio1.03
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.11 mm6.87 mm1.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG770641066
Side View
Table 56.0%Crown 38.6°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 62.6%

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 30
Current: $3,480 USD|Low: $413 USD|High: $3,480 USD|Avg: $1,239 USD
Brilliant Earth
Retailer 2
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Retailer 5
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Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 17
October 30, 2026
Retailer 2$449 USD
Retailer 4$463 USD
Retailer 10$478 USD
Retailer 15$575 USD
Retailer 3$716 USD
Retailer 6$739 USD
Retailer 14$796 USD
Retailer 11$836 USD
Retailer 12$851 USD
Retailer 17$1,042 USD
Retailer 5$1,160 USD
Retailer 8$1,527 USD
Retailer 9$1,694 USD
Retailer 7$1,747 USD
Retailer 13$1,819 USD
Retailer 16$2,345 USD
Brilliant Earth$3,480 USD

35 data points across 17 retailers

19 retailers$449 USD to $3,480 USD

A
Cheapest Retailer
-
$449 USD
Final sale: no returns
A
Retailer 2
-
$463 USD
View
A
Retailer 3
-
$478 USD
£376 GBP
View
A
Retailer 4
-
$575 USD
View
A
Retailer 5
-
$716 USD
View
A
Retailer 6
-
$739 USD
View
A
Retailer 7
-
$796 USD
ZAR 12,852 ZAR
View
A
Retailer 8
-
$836 USD
£659 GBP
View
A
Retailer 9
-
$851 USD
€810 EUR
View
A
Retailer 10
-
$1,042 USD
View
A
Retailer 11
-
$1,160 USD
View
B+
Retailer 12
-
$1,527 USD
View
B+
Retailer 13
-
$1,560 USD
View
B+
Retailer 14
-
$1,694 USD
View
B+
Retailer 15
-
$1,733 USD
View
B+
Retailer 16
-
$1,747 USD
View
B+
Retailer 17
-
$1,819 USD
£1,432 GBP
View
Retailer 18
-
$2,345 USD
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
20258573A · Oct 29
$3,480 USD
View
18 more retailers have this diamond
Prices start from $449 USDSave up to $3,031 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
$449 USD