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Cushion|Lab Grown|IGI

3.18ct D SI1 Cushion Lab Grown Diamond

EX • D/SI1 • IGI LG639415932

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG639415932

Diamond specifications and retailer prices

From $817 CAD
$585 USD
As of October 29, 2026
Save $2,209 CAD (73%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $3,027 CAD at MOH London · As of October 29, 2026
View at MOH London

About this 3.18ct lab-grown cushion diamond

This 3.18ct lab-grown cushion sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG639415932 or 639415932. Listed at 11 retailers as of October 29, 2026, with prices from $817 to $3,027, a $2,209 spread on the same certified stone. MOH London lists it at $3,027. 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

3.18
Carat
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle39.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG639415932
Dimensions8.76 × 8.65 × 5.53 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.76 mm8.65 mm3.18 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG639415932
Side View
Table 63.0%Crown 34.6°Girdle: MED-STKPavilion 39.6°Culet: NoneDepth 63.9%

Caratlytics Score

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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 29
Current: $3,027 CAD|Low: $817 CAD|High: $3,823 CAD|Avg: $1,563 CAD|-19.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 3$817 CAD
Retailer 9$820 CAD
Retailer 8$894 CAD
Retailer 5$1,069 CAD
Retailer 6$1,069 CAD
Retailer 7$1,240 CAD
Retailer 4$1,244 CAD
Retailer 2$1,359 CAD
Retailer 10$2,348 CAD
Retailer 11$2,600 CAD
MOH London$3,027 CAD

44 data points across 11 retailers

11 retailers$817 CAD to $3,027 CAD

A
Cheapest Retailer
-
$817 CAD
$585 USD
Final sale: no returns
Retailer 2
-
$820 CAD
$587 USD
View
Price last confirmed 14 days ago
A
Retailer 3
-
$894 CAD
HK$5,000 HKD
View
A
Retailer 4
-
$1,069 CAD
$765 USD
View
B+
Retailer 5
-
$1,069 CAD
$765 USD
View
A
Retailer 6
-
$1,240 CAD
$888 USD
View
A
Retailer 7
-
$1,244 CAD
€848 EUR
View
A
Retailer 8
-
$1,359 CAD
£766 GBP
View
B
Retailer 9
-
$2,348 CAD
$1,681 USD
View
B+
Retailer 10
-
$2,600 CAD
SGD 2,515 SGD
View
Most Expensive
B
MOH London
LG639415932 · Oct 29
$3,027 CAD
£1,706 GBP
View
10 more retailers have this diamond
Prices start from $817 CADSave up to $2,209 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
3.18ct Cushion
$817 CAD