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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 $741 NZD
$417 USD
As of November 1, 2026
Save $3,595 NZD (83%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $4,337 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 LG770641066 or 770641066. Listed at 19 retailers as of November 1, 2026, with prices from $741 to $4,337, a $3,595 spread on the same certified stone. Brilliant Earth lists it at $4,337. 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
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

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $4,337 NZD|Low: $734 NZD|High: $6,185 NZD|Avg: $2,221 NZD|-29.9%
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 2, 2026
Retailer 16$741 NZD
Retailer 6$823 NZD
Retailer 10$847 NZD
Retailer 17$1,022 NZD
Retailer 5$1,273 NZD
Retailer 7$1,313 NZD
Retailer 11$1,419 NZD
Retailer 12$1,474 NZD
Retailer 14$1,500 NZD
Retailer 4$1,852 NZD
Retailer 2$2,087 NZD
Retailer 9$2,714 NZD
Retailer 8$3,105 NZD
Retailer 15$3,107 NZD
Retailer 13$3,214 NZD
Retailer 3$4,168 NZD
Brilliant Earth$4,337 NZD

33 data points across 17 retailers

19 retailers$741 NZD to $4,337 NZD

A
Cheapest Retailer
-
$741 NZD
$417 USD
Final sale: no returns
Retailer 2
-
$823 NZD
$463 USD
View
Price last confirmed 8 days ago
A
Retailer 3
-
$847 NZD
£375 GBP
View
A
Retailer 4
-
$1,022 NZD
$575 USD
View
A
Retailer 5
-
$1,273 NZD
$716 USD
View
A
Retailer 6
-
$1,313 NZD
$739 USD
View
A
Retailer 7
-
$1,419 NZD
ZAR 12,898 ZAR
View
A
Retailer 8
-
$1,474 NZD
£653 GBP
View
A
Retailer 9
-
$1,500 NZD
€804 EUR
View
A
Retailer 10
-
$1,852 NZD
$1,042 USD
View
A
Retailer 11
-
$2,087 NZD
$1,174 USD
View
B+
Retailer 12
-
$2,714 NZD
$1,527 USD
View
B+
Retailer 13
-
$2,773 NZD
$1,560 USD
View
B+
Retailer 14
-
$3,011 NZD
$1,694 USD
View
B+
Retailer 15
-
$3,105 NZD
$1,747 USD
View
B+
Retailer 16
-
$3,107 NZD
$1,748 USD
View
B+
Retailer 17
-
$3,214 NZD
£1,424 GBP
View
Retailer 18
-
$4,168 NZD
$2,345 USD
View
Price last confirmed 12 days ago
Most Expensive
B
Brilliant Earth
20258573A · Nov 2
$4,337 NZD
$2,440 USD
View
18 more retailers have this diamond
Prices start from $741 NZDSave up to $3,595 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
$741 NZD