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Cushion|Lab Grown|IGI

3.11ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG828661993

Shape and cutting style on the report: Cushion mixed cut

Certificate IGI LG828661993

Diamond specifications and retailer prices

From $1,577 CAD
$1,121 USD
As of November 6, 2026
1 retailer carries this diamond
Only listing: $1,577 CAD at Loose Grown Diamond
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Loose Grown Diamond

About this 3.11ct lab-grown cushion diamond

This 3.11ct lab-grown cushion sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG828661993 or 828661993. Listed at a single retailer as of November 6, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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

3.11
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.9°
Pavilion angle41.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG828661993
Dimensions9.89 × 6.69 × 4.75 mm
L/W Ratio1.48
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.89 mm6.69 mm3.11 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG828661993
Side View
Table 64.0%Crown 39.9°Girdle: THK-VTKPavilion 41.9°Culet: LargeDepth 71.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 6
Current: $1,577 CAD|Low: $1,577 CAD|High: $2,189 CAD|Avg: $1,837 CAD|-1.8%
Loose Grown Diamond
Retailer 2
Retailer 3
October 28, 2026
Loose Grown Diamond$1,577 CAD
Retailer 3$1,732 CAD
Retailer 2$2,189 CAD

2 data points across 3 retailers

1 retailer

B+
Loose Grown Diamond
828661993 · Nov 6
$1,577 CAD
$1,121 USD
View

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B+
3.11ct Cushion
$1,577 CAD