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Cushion|Lab Grown|IGI

3.51ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG823696410

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG823696410

Diamond specifications and retailer prices

From $805 CAD
HK$4,500 HKD
As of October 30, 2026
Save $3,079 CAD (79%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $3,883 CAD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 3.51ct lab-grown cushion diamond

This 3.51ct lab-grown cushion sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG823696410 or 823696410. Listed at 12 retailers as of October 30, 2026, with prices from $805 to $3,883, a $3,079 spread on the same certified stone. Brilliant Earth lists it at $3,883. 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

3.51
Carat
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle36.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG823696410
Dimensions10.54 × 7.56 × 5.12 mm
L/W Ratio1.39
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.54 mm7.56 mm3.51 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG823696410
Side View
Table 63.0%Crown 36.3°Girdle: MED-THKPavilion 36.4°Culet: NoneDepth 67.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $3,883 CAD|Low: $680 CAD|High: $7,320 CAD|Avg: $2,175 CAD|-46.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 5$680 CAD
Retailer 2$805 CAD
Retailer 9$927 CAD
Retailer 8$957 CAD
Retailer 6$1,146 CAD
Retailer 3$1,189 CAD
Retailer 10$1,239 CAD
Retailer 13$1,827 CAD
Retailer 4$1,898 CAD
Retailer 7$2,372 CAD
Retailer 11$2,778 CAD
Retailer 12$3,758 CAD
Brilliant Earth$3,883 CAD

40 data points across 13 retailers

12 retailers$805 CAD to $3,883 CAD

A
Cheapest Retailer
-
$805 CAD
HK$4,500 HKD
A
Retailer 2
-
$927 CAD
£523 GBP
View
A
Retailer 3
-
$957 CAD
$685 USD
View
A
Retailer 4
-
$1,146 CAD
€781 EUR
View
B+
Retailer 5
-
$1,189 CAD
$851 USD
View
A
Retailer 6
-
$1,239 CAD
£699 GBP
View
B+
Retailer 7
-
$1,827 CAD
$1,308 USD
View
B+
Retailer 8
-
$1,898 CAD
$1,359 USD
View
B+
Retailer 9
-
$2,372 CAD
SGD 2,295 SGD
View
B+
Retailer 10
-
$2,778 CAD
£1,566 GBP
View
B
Retailer 11
-
$3,758 CAD
$2,690 USD
View
Most Expensive
B
Brilliant Earth
20881638A · Oct 30
$3,883 CAD
$2,780 USD
View
11 more retailers have this diamond
Prices start from $805 CADSave up to $3,079 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
3.51ct Cushion
$805 CAD