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Cushion|Lab Grown|IGI

1.80ct J SI1 Cushion Lab Grown Diamond

ID • J/SI1 • IGI LG436045153

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG436045153

Diamond specifications and retailer prices

From $1,411 CAD
$1,010 USD
As of October 30, 2026
Save $5,561 CAD (80%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $6,972 CAD at MOH London · As of October 29, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436045153 or 436045153. Listed at 6 retailers as of October 29, 2026, with prices from $1,411 to $6,972, a $5,561 spread on the same certified stone. MOH London lists it at $6,972. 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
J
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.7°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436045153
Dimensions7.61 × 7.29 × 4.55 mm
L/W Ratio1.04
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.61 mm7.29 mm1.80 ctJ / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436045153
Side View
Table 64.0%Crown 36.7°Girdle: STK-THKPavilion 40.4°Culet: NoneDepth 62.4%

Caratlytics Score

How it works →
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: Oct 30
Current: $6,972 CAD|Low: $1,411 CAD|High: $7,018 CAD|Avg: $3,479 CAD|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 2$1,411 CAD
Retailer 5$2,083 CAD
Retailer 4$2,158 CAD
Retailer 6$2,396 CAD
Retailer 7$2,981 CAD
Retailer 3$3,414 CAD
Retailer 8$6,181 CAD
MOH London$6,972 CAD

12 data points across 8 retailers

6 retailers$1,411 CAD to $6,972 CAD

A
Cheapest Retailer
-
$1,411 CAD
$1,010 USD
A
Retailer 2
-
$2,083 CAD
$1,491 USD
View
Final sale: no returns
Retailer 3
-
$2,158 CAD
$1,545 USD
View
Price last confirmed 18 days ago
A
Retailer 4
-
$2,396 CAD
$1,715 USD
View
B+
Retailer 5
-
$3,414 CAD
$2,444 USD
View
Most Expensive
B
MOH London
LG436045153 · Oct 29
$6,972 CAD
£3,930 GBP
View
5 more retailers have this diamond
Prices start from $1,411 CADSave up to $5,561 CAD

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
$1,411 CAD