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Cushion|Lab Grown|IGI

1.55ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG819628565

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

Certificate IGI LG819628565

Diamond specifications and retailer prices

From $291 CAD
$208 USD
As of October 28, 2026
Save $312 CAD (52%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $603 CAD at 77 Diamonds · As of October 29, 2026
View at 77 Diamonds

About this 1.55ct lab-grown cushion diamond

This 1.55ct lab-grown cushion sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG819628565 or 819628565. Listed at 2 retailers as of October 28, 2026, with prices from $291 to $603, a $312 spread on the same certified stone. 77 Diamonds lists it at $603. 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

1.55
Carat
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG819628565
Dimensions6.74 × 6.64 × 4.51 mm
L/W Ratio1.02
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.74 mm6.64 mm1.55 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG819628565
Side View
Table 62.0%Crown 34.3°Girdle: MED-STKPavilion 39.1°Culet: NoneDepth 67.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 28
Current: $603 CAD|Low: $291 CAD|High: $680 CAD|Avg: $578 CAD|-9.6%
77 Diamonds
Retailer 2
Retailer 3
October 29, 2026
Retailer 2$291 CAD
Retailer 3$574 CAD
77 Diamonds$603 CAD

36 data points across 3 retailers

2 retailers$291 CAD to $603 CAD

A
Cheapest Retailer
-
$291 CAD
$208 USD
Final sale: no returns
Most Expensive
A
77 Diamonds
CUSTVSEGGT8YGW · Oct 29
$603 CAD
£339 GBP
View
1 more retailer has this diamond
Prices start from $291 CADSave up to $312 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
1.55ct Cushion
$291 CAD