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Cushion|Lab Grown|IGI

1.50ct I SI1 Cushion Lab Grown Diamond

GD • I/SI1 • IGI LG436074055

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG436074055

Diamond specifications and retailer prices

From $4,221 NZD
$2,379 USD
As of November 1, 2026
Save $4,394 NZD (51%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $8,615 NZD at MOH London · As of October 29, 2026
View at MOH London

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 I colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG436074055 or 436074055. Listed at 4 retailers as of October 29, 2026, with prices from $4,221 to $8,615, a $4,394 spread on the same certified stone. MOH London lists it at $8,615. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.50
Carat
I
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436074055
Dimensions6.57 × 6.55 × 4.51 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
6.57 mm6.55 mm1.50 ctI / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436074055
Side View
Table 57.5%Crown 33.2°Girdle: STK-VTKPavilion 40.7°Culet: NoneDepth 68.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $8,615 NZD|Low: $2,667 NZD|High: $8,673 NZD|Avg: $4,761 NZD|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 29, 2026
Retailer 4$2,667 NZD
Retailer 6$3,092 NZD
Retailer 5$3,676 NZD
Retailer 3$4,221 NZD
Retailer 2$4,223 NZD
MOH London$8,615 NZD

14 data points across 6 retailers

4 retailers$4,221 NZD to $8,615 NZD

Retailer 1
-
$2,667 NZD
$1,503 USD
Price last confirmed 20 days ago
B
Retailer 2
-
$4,221 NZD
$2,379 USD
View
B
Retailer 3
-
$4,223 NZD
$2,380 USD
View
Most Expensive
C
MOH London
LG436074055 · Oct 29
$8,615 NZD
£3,823 GBP
View
3 more retailers have this diamond
Prices start from $4,221 NZDSave up to $4,394 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.

B
1.50ct Cushion
$4,221 NZD