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Cushion|Lab Grown|IGI

4.09ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG677556271

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG677556271

Diamond specifications and retailer prices

From $681 CAD
£384 GBP
As of November 1, 2026
Save $2,623 CAD (79%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $3,304 CAD at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 4.09ct lab-grown cushion diamond

This 4.09ct 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 LG677556271 or 677556271. Listed at 10 retailers as of October 28, 2026, with prices from $681 to $3,304, a $2,623 spread on the same certified stone. Rare Carat lists it at $3,304. 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

4.09
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.8°
Pavilion angle38.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG677556271
Dimensions10.61 × 8.73 × 5.91 mm
L/W Ratio1.22
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.61 mm8.73 mm4.09 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG677556271
Side View
Table 61.0%Crown 33.8°Girdle: MED-STKPavilion 38.2°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: Nov 1
Current: $4,884 CAD|Low: $681 CAD|High: $8,046 CAD|Avg: $2,700 CAD
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 5$681 CAD
Retailer 10$876 CAD
Retailer 7$992 CAD
Retailer 6$1,194 CAD
Retailer 12$1,238 CAD
Retailer 9$1,271 CAD
Retailer 2$1,296 CAD
Retailer 11$1,632 CAD
Retailer 8$2,917 CAD
Rare Carat$4,884 CAD
Retailer 3$6,625 CAD
Retailer 4$8,046 CAD

6 data points across 12 retailers

10 retailers$681 CAD to $3,304 CAD

A
Cheapest Retailer
-
$681 CAD
£384 GBP
A
Retailer 2
-
$876 CAD
HK$4,900 HKD
View
A
Retailer 3
-
$992 CAD
$710 USD
View
A
Retailer 4
-
$1,194 CAD
€814 EUR
View
B+
Retailer 5
-
$1,238 CAD
$886 USD
View
A
Retailer 6
-
$1,271 CAD
$910 USD
View
A
Retailer 7
-
$1,296 CAD
£731 GBP
View
A
Retailer 8
-
$1,632 CAD
$1,168 USD
View
B
Retailer 9
-
$2,917 CAD
£1,644 GBP
View
Most Expensive
B
Rare Carat
KI2715562KF677 · Oct 28
$3,304 CAD
$2,365 USD
View
9 more retailers have this diamond
Prices start from $681 CADSave up to $2,623 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
4.09ct Cushion
$681 CAD