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Cushion|Lab Grown|IGI

1.80ct I SI1 Cushion Lab Grown Diamond

ID • I/SI1 • IGI LG436045240

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG436045240

Diamond specifications and retailer prices

From $784 NZD
$442 USD
As of November 1, 2026
Save $2,623 NZD (77%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $3,407 NZD at MOH London · As of November 1, 2026
View at MOH London

About this 1.8ct lab-grown cushion diamond

This 1.8ct 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 top-tier cut grade and certified by IGI LG436045240 or 436045240. Listed at 9 retailers as of November 1, 2026, with prices from $784 to $3,407, a $2,623 spread on the same certified stone. MOH London lists it at $3,407. 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

1.80
Carat
I
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436045240
Dimensions7.06 × 7.00 × 4.66 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.06 mm7.00 mm1.80 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436045240
Side View
Table 63.5%Crown 35.1°Girdle: STK-VTKPavilion 40.7°Culet: NoneDepth 66.6%

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: $3,407 NZD|Low: $768 NZD|High: $3,448 NZD|Avg: $1,530 NZD|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 8$784 NZD
Retailer 5$871 NZD
Retailer 6$997 NZD
Retailer 3$1,002 NZD
Retailer 2$1,164 NZD
Retailer 7$1,324 NZD
Retailer 4$1,382 NZD
Retailer 9$2,867 NZD
MOH London$3,407 NZD

39 data points across 9 retailers

9 retailers$784 NZD to $3,407 NZD

A
Cheapest Retailer
-
$784 NZD
$442 USD
Final sale: no returns
Retailer 2
-
$871 NZD
$491 USD
View
Price last confirmed 8 days ago
A
Retailer 3
-
$997 NZD
$562 USD
View
A
Retailer 4
-
$1,002 NZD
$565 USD
View
A
Retailer 5
-
$1,164 NZD
£517 GBP
View
B+
Retailer 6
-
$1,324 NZD
$746 USD
View
B+
Retailer 7
-
$1,382 NZD
$779 USD
View
B
Retailer 8
-
$2,867 NZD
$1,616 USD
View
Most Expensive
B
MOH London
LG436045240 · Nov 1
$3,407 NZD
£1,512 GBP
View
8 more retailers have this diamond
Prices start from $784 NZDSave up to $2,623 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
1.80ct Cushion
$784 NZD