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Cushion|Lab Grown|IGI

3.11ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG538202521

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG538202521

Diamond specifications and retailer prices

From $688 AUD
As of November 6, 2026
Save $1,731 AUD (72%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $2,420 AUD at MOH London · As of November 5, 2026
View at MOH London

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 LG538202521 or 538202521. Listed at 9 retailers as of November 5, 2026, with prices from $688 to $2,420, a $1,731 spread on the same certified stone. MOH London lists it at $2,420. 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
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG538202521
Dimensions9.68 × 7.91 × 5.38 mm
L/W Ratio1.22
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
9.68 mm7.91 mm3.11 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG538202521
Side View
Table 62.5%Crown 33.3°Girdle: MED-STKPavilion 39.1°Culet: NoneDepth 68.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: $2,420 AUD|Low: $688 AUD|High: $6,375 AUD|Avg: $2,228 AUD|-0.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 9$688 AUD
Retailer 5$755 AUD
Retailer 7$844 AUD
Retailer 11$998 AUD
Retailer 2$1,004 AUD
Retailer 8$1,086 AUD
Retailer 6$1,103 AUD
Retailer 10$1,530 AUD
MOH London$2,420 AUD
Retailer 3$3,918 AUD
Retailer 12$5,710 AUD
Retailer 4$6,375 AUD

10 data points across 12 retailers

9 retailers$688 AUD to $2,420 AUD

A
Cheapest Retailer
-
$688 AUD
A
Retailer 2
-
$755 AUD
View
A
Retailer 3
-
$844 AUD
View
B+
Retailer 4
-
$998 AUD
View
A
Retailer 5
-
$1,004 AUD
View
A
Retailer 6
-
$1,086 AUD
View
A
Retailer 7
-
$1,103 AUD
View
A
Retailer 8
-
$1,530 AUD
View
Most Expensive
B+
MOH London
LG538202521 · Nov 5
$2,420 AUD
£1,309 GBP
View
8 more retailers have this diamond
Prices start from $688 AUDSave up to $1,731 AUD

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
3.11ct Cushion
$688 AUD