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Cushion|Lab Grown|IGI

1.51ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG626419440

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG626419440

Diamond specifications and retailer prices

From $871 NZD
$490 USD
As of November 1, 2026
Save $3,430 NZD (80%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $4,301 NZD at Brilliant Earth · As of November 2, 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 LG626419440 or 626419440. Listed at 8 retailers as of November 1, 2026, with prices from $871 to $4,301, a $3,430 spread on the same certified stone. Brilliant Earth lists it at $4,301. 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
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG626419440
Dimensions6.66 × 6.64 × 4.48 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
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
6.66 mm6.64 mm1.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG626419440
Side View
Table 60.0%Crown 36.1°Girdle: MED-STKPavilion 40.2°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: Nov 1
Current: $4,301 NZD|Low: $871 NZD|High: $8,999 NZD|Avg: $2,657 NZD|-18.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 6$871 NZD
Retailer 8$1,297 NZD
Retailer 4$1,297 NZD
Retailer 7$1,486 NZD
Retailer 2$2,732 NZD
Retailer 5$3,742 NZD
Retailer 3$3,875 NZD
Brilliant Earth$4,301 NZD

11 data points across 8 retailers

8 retailers$871 NZD to $4,301 NZD

A
Cheapest Retailer
-
$871 NZD
$490 USD
Final sale: no returns
A
Retailer 2
-
$1,297 NZD
HK$5,700 HKD
View
A
Retailer 3
-
$1,297 NZD
$730 USD
View
A
Retailer 4
-
$1,486 NZD
$836 USD
View
B+
Retailer 5
-
$2,732 NZD
A$2,365 AUD
View
B+
Retailer 6
-
$3,742 NZD
SGD 2,845 SGD
View
Retailer 7
-
$3,875 NZD
$2,180 USD
View
Price last confirmed 12 days ago
Most Expensive
B+
Brilliant Earth
15233891Y · Nov 2
$4,301 NZD
$2,420 USD
View
7 more retailers have this diamond
Prices start from $871 NZDSave up to $3,430 NZD

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
$871 NZD