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Cushion|Lab Grown|IGI

1.67ct D SI1 Cushion Lab Grown Diamond

EX • D/SI1 • IGI LG508138247

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG508138247

Diamond specifications and retailer prices

From $443 CAD
$317 USD
As of October 30, 2026
Save $2,016 CAD (82%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $2,459 CAD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.67ct lab-grown cushion diamond

This 1.67ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG508138247 or 508138247. Listed at 11 retailers as of October 30, 2026, with prices from $443 to $2,459, a $2,016 spread on the same certified stone. Brilliant Earth lists it at $2,459. 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

1.67
Carat
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle32.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG508138247
Dimensions7.01 × 6.61 × 4.24 mm
L/W Ratio1.06
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.01 mm6.61 mm1.67 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG508138247
Side View
Table 57.0%Crown 36°Girdle: MED-THKPavilion 32.9°Culet: NoneDepth 64.1%

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: Oct 30
Current: $2,459 CAD|Low: $443 CAD|High: $3,115 CAD|Avg: $1,117 CAD|-18.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 9$443 CAD
Retailer 8$490 CAD
Retailer 5$705 CAD
Retailer 4$712 CAD
Retailer 6$810 CAD
Retailer 3$856 CAD
Retailer 2$866 CAD
Retailer 11$968 CAD
Retailer 10$1,575 CAD
Retailer 7$1,969 CAD
Brilliant Earth$2,459 CAD

39 data points across 11 retailers

11 retailers$443 CAD to $2,459 CAD

A
Cheapest Retailer
-
$443 CAD
$317 USD
Final sale: no returns
Retailer 2
-
$490 CAD
$351 USD
View
Price last confirmed 15 days ago
A
Retailer 3
-
$705 CAD
$505 USD
View
A
Retailer 4
-
$712 CAD
$510 USD
View
A
Retailer 5
-
$810 CAD
€552 EUR
View
B+
Retailer 6
-
$856 CAD
$613 USD
View
A
Retailer 7
-
$866 CAD
£488 GBP
View
B+
Retailer 8
-
$968 CAD
$693 USD
View
Retailer 9
-
$1,575 CAD
SGD 1,524 SGD
View
Price last confirmed 18 days ago
B
Retailer 10
-
$1,969 CAD
£1,110 GBP
View
Most Expensive
B
Brilliant Earth
20666774A · Oct 30
$2,459 CAD
$1,760 USD
View
10 more retailers have this diamond
Prices start from $443 CADSave up to $2,016 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
1.67ct Cushion
$443 CAD