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Cushion|Lab Grown|IGI

1.50ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG775629456

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

Certificate IGI LG775629456

Diamond specifications and retailer prices

From $353 NZD
$199 USD
As of November 1, 2026
Save $1,652 NZD (82%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $2,005 NZD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.5ct lab-grown cushion diamond

This 1.5ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG775629456 or 775629456. Listed at 12 retailers as of October 31, 2026, with prices from $353 to $2,005, a $1,652 spread on the same certified stone. Brilliant Earth lists it at $2,005. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.50
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle32.1°
Pavilion angle34.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG775629456
Dimensions6.71 × 6.60 × 4.07 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.71 mm6.60 mm1.50 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG775629456
Side View
Table 65.0%Crown 32.1°Girdle: MED-STKPavilion 34.6°Culet: NoneDepth 61.7%

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: Nov 1
Current: $2,005 NZD|Low: $353 NZD|High: $2,236 NZD|Avg: $958 NZD|-9.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 10$353 NZD
Retailer 3$415 NZD
Retailer 11$694 NZD
Retailer 2$696 NZD
Retailer 6$725 NZD
Retailer 4$728 NZD
Retailer 8$848 NZD
Retailer 9$852 NZD
Retailer 7$981 NZD
Retailer 12$1,352 NZD
Retailer 5$1,825 NZD
Brilliant Earth$2,005 NZD

45 data points across 12 retailers

12 retailers$353 NZD to $2,005 NZD

A
Cheapest Retailer
-
$353 NZD
$199 USD
Final sale: no returns
Retailer 2
-
$415 NZD
$234 USD
View
Price last confirmed 8 days ago
B+
Retailer 3
-
$694 NZD
$391 USD
View
A
Retailer 4
-
$696 NZD
£309 GBP
View
A
Retailer 5
-
$725 NZD
€389 EUR
View
Retailer 6
-
$728 NZD
£323 GBP
View
Price last confirmed 19 days ago
A
Retailer 7
-
$848 NZD
$478 USD
View
A
Retailer 8
-
$852 NZD
$480 USD
View
B+
Retailer 9
-
$981 NZD
$553 USD
View
B+
Retailer 10
-
$1,352 NZD
$762 USD
View
B
Retailer 11
-
$1,825 NZD
£810 GBP
View
Most Expensive
B
Brilliant Earth
17807477A · Oct 31
$2,005 NZD
$1,130 USD
View
11 more retailers have this diamond
Prices start from $353 NZDSave up to $1,652 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
1.50ct Cushion
$353 NZD