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Cushion|Lab Grown|IGI

1.28ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG783648800

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG783648800

Diamond specifications and retailer prices

From $1,650 CAD
$1,181 USD
As of October 26, 2026
Save $1,661 CAD (50%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $3,311 CAD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG783648800 or 783648800. Listed at 4 retailers as of October 26, 2026, with prices from $1,650 to $3,311, a $1,661 spread on the same certified stone. Brilliant Earth lists it at $3,311. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle33.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG783648800
Dimensions8.12 × 5.54 × 3.47 mm
L/W Ratio1.47
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
8.12 mm5.54 mm1.28 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG783648800
Side View
Table 60.0%Crown 36.3°Girdle: THN-STKPavilion 33.7°Culet: NoneDepth 62.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 26
Current: $3,311 CAD|Low: $999 CAD|High: $4,749 CAD|Avg: $2,583 CAD|-30.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 5$999 CAD
Retailer 8$1,613 CAD
Retailer 2$1,650 CAD
Retailer 11$2,004 CAD
Retailer 4$2,013 CAD
Retailer 10$2,081 CAD
Retailer 9$2,092 CAD
Retailer 12$2,379 CAD
Retailer 6$2,721 CAD
Brilliant Earth$3,311 CAD
Retailer 7$4,470 CAD
Retailer 3$4,488 CAD

15 data points across 12 retailers

4 retailers$1,650 CAD to $3,311 CAD

Retailer 1
-
$999 CAD
$715 USD
Price last confirmed 18 days ago
B+
Retailer 2
-
$1,650 CAD
$1,181 USD
View
Retailer 3
-
$2,721 CAD
£1,534 GBP
View
Price last confirmed 19 days ago
Most Expensive
B
Brilliant Earth
21401971Y · Oct 30
$3,311 CAD
$2,370 USD
View
3 more retailers have this diamond
Prices start from $1,650 CADSave up to $1,661 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.

B+
1.28ct Cushion
$1,650 CAD