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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 $473 USD
As of November 6, 2026
Save $1,189 USD (72%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $1,662 USD 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 $473 to $1,662, a $1,189 spread on the same certified stone. MOH London lists it at $1,662. 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 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

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: Nov 6
Current: $1,662 USD|Low: $473 USD|High: $4,380 USD|Avg: $1,531 USD|-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$473 USD
Retailer 5$519 USD
Retailer 7$580 USD
Retailer 11$686 USD
Retailer 2$690 USD
Retailer 8$746 USD
Retailer 6$758 USD
Retailer 10$1,051 USD
MOH London$1,662 USD
Retailer 3$2,692 USD
Retailer 12$3,923 USD
Retailer 4$4,380 USD

10 data points across 12 retailers

9 retailers$473 USD to $1,662 USD

A
Cheapest Retailer
-
$473 USD
A
Retailer 2
-
$519 USD
View
A
Retailer 3
-
$580 USD
View
B+
Retailer 4
-
$686 USD
View
A
Retailer 5
-
$690 USD
View
A
Retailer 6
-
$746 USD
View
A
Retailer 7
-
$758 USD
View
A
Retailer 8
-
$1,051 USD
View
Most Expensive
B+
MOH London
LG538202521 · Nov 5
$1,662 USD
£1,309 GBP
View
8 more retailers have this diamond
Prices start from $473 USDSave up to $1,189 USD

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
$473 USD