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Cushion|Lab Grown|IGI

1.28ct D VS1 Cushion Lab Grown Diamond

ID • D/VS1 • IGI LG786634100

Shape and cutting style on the report: Antique cushion cut

Certificate IGI LG786634100

Diamond specifications and retailer prices

From $444 CAD
$318 USD
As of October 29, 2026
Save $2,483 CAD (85%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $2,927 CAD at Queensmith · As of October 27, 2026
View at Queensmith

About this 1.28ct lab-grown cushion diamond

This 1.28ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG786634100 or 786634100. Listed at 18 retailers as of October 27, 2026, with prices from $444 to $2,927, a $2,483 spread on the same certified stone. Queensmith lists it at $2,927. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
D
Color
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG786634100
Dimensions7.02 × 6.25 × 3.93 mm
L/W Ratio1.12
Girdle conditionFaceted
Culet sizeLarge
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
7.02 mm6.25 mm1.28 ctD / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG786634100
Side View
Table 52.0%Crown 34.5°Girdle: Slightly ThickPavilion 41.1°Culet: LargeDepth 62.9%

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: $974 CAD|Low: $426 CAD|High: $2,234 CAD|Avg: $1,104 CAD|+2.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 31, 2026
Retailer 11$444 CAD
Retailer 5$497 CAD
Retailer 4$515 CAD
Retailer 2$550 CAD
Retailer 13$550 CAD
Retailer 12$740 CAD
Retailer 8$768 CAD
Retailer 1$974 CAD
Retailer 7$1,343 CAD
Retailer 10$1,615 CAD
Retailer 3$1,762 CAD
Retailer 14$1,770 CAD
Retailer 6$2,150 CAD
Retailer 9$2,209 CAD

44 data points across 14 retailers

18 retailers$444 CAD to $2,927 CAD

A
Cheapest Retailer
-
$444 CAD
$318 USD
A
Retailer 2
-
$497 CAD
$356 USD
View
Final sale: no returns
A
Retailer 3
-
$515 CAD
$369 USD
View
A
Retailer 4
-
$550 CAD
$394 USD
View
A
Retailer 5
-
$550 CAD
$394 USD
View
A
Retailer 6
-
$740 CAD
$530 USD
View
B+
Retailer 7
-
$768 CAD
$550 USD
View
B+
Retailer 8
-
$772 CAD
$553 USD
View
B+
Retailer 9
-
$974 CAD
£549 GBP
View
B
Retailer 10
-
$1,343 CAD
A$1,479 AUD
View
B
Retailer 11
-
$1,615 CAD
$1,156 USD
View
B
Retailer 12
-
$1,762 CAD
SGD 1,705 SGD
View
B
Retailer 13
-
$1,770 CAD
$1,267 USD
View
B
Retailer 14
-
$1,833 CAD
$1,312 USD
View
B
Retailer 15
-
$2,150 CAD
£1,212 GBP
View
B
Retailer 16
-
$2,193 CAD
$1,570 USD
View
B
Retailer 17
-
$2,209 CAD
£1,245 GBP
View
Most Expensive
B
Queensmith
LG786634100 · Oct 27
$2,927 CAD
£1,650 GBP
View
17 more retailers have this diamond
Prices start from $444 CADSave up to $2,483 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
1.28ct Cushion
$444 CAD