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Cushion|Lab Grown|IGI

4.00ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG842609877

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG842609877

Diamond specifications and retailer prices

From $689 CAD
£388 GBP
As of October 27, 2026
Save $3,725 CAD (84%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $4,414 CAD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 4ct lab-grown cushion diamond

This 4ct 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 LG842609877 or 842609877. Listed at 12 retailers as of October 27, 2026, with prices from $689 to $4,414, a $3,725 spread on the same certified stone. Brilliant Earth lists it at $4,414. 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

4.00
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle34.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG842609877
Dimensions10.67 × 8.13 × 5.53 mm
L/W Ratio1.31
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.67 mm8.13 mm4.00 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG842609877
Side View
Table 67.0%Crown 34.9°Girdle: MED-THKPavilion 34.4°Culet: NoneDepth 68.0%

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 27
Current: $4,414 CAD|Low: $681 CAD|High: $8,339 CAD|Avg: $2,238 CAD|-47.1%
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 31, 2026
Retailer 9$689 CAD
Retailer 13$742 CAD
Retailer 3$894 CAD
Retailer 6$1,194 CAD
Retailer 8$1,243 CAD
Retailer 11$1,284 CAD
Retailer 10$1,357 CAD
Retailer 2$1,896 CAD
Retailer 5$1,931 CAD
Retailer 7$2,575 CAD
Retailer 12$3,025 CAD
Retailer 4$3,220 CAD
Brilliant Earth$4,414 CAD

18 data points across 13 retailers

12 retailers$689 CAD to $4,414 CAD

A
Cheapest Retailer
-
$689 CAD
£388 GBP
A
Retailer 2
-
$894 CAD
HK$5,000 HKD
View
A
Retailer 3
-
$1,194 CAD
€814 EUR
View
B+
Retailer 4
-
$1,243 CAD
$890 USD
View
B+
Retailer 5
-
$1,284 CAD
$919 USD
View
A
Retailer 6
-
$1,357 CAD
£765 GBP
View
Retailer 7
-
$1,896 CAD
$1,357 USD
View
B+
Retailer 8
-
$1,931 CAD
$1,382 USD
View
B+
Retailer 9
-
$2,575 CAD
SGD 2,491 SGD
View
B
Retailer 10
-
$3,025 CAD
£1,705 GBP
View
B
Retailer 11
-
$3,220 CAD
$2,305 USD
View
Most Expensive
B
Brilliant Earth
21831648A · Oct 30
$4,414 CAD
$3,160 USD
View
11 more retailers have this diamond
Prices start from $689 CADSave up to $3,725 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
4.00ct Cushion
$689 CAD