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Cushion|Lab Grown|IGI

1.78ct D IF Cushion Lab Grown Diamond

VG • D/IF • IGI LG791618528

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG791618528

Diamond specifications and retailer prices

From $1,733 CAD
$1,238 USD
As of October 30, 2026
Save $6,189 CAD (78%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $13,926 CAD at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 1.78ct lab-grown cushion diamond

This 1.78ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG791618528 or 791618528. Listed at 16 retailers as of October 29, 2026, with a 357% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.78
Carat
D
Color
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle30.2°
Pavilion angle33.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG791618528
Dimensions8.79 × 6.48 × 4.07 mm
L/W Ratio1.36
Girdle conditionFaceted
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
8.79 mm6.48 mm1.78 ctD / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG791618528
Side View
Table 59.0%Crown 30.2°Girdle: MED-STKPavilion 33.6°Culet: NoneDepth 62.7%

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 30
Current: $2,829 CAD|Low: $1,733 CAD|High: $8,160 CAD|Avg: $4,007 CAD|-0.6%
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
Retailer 15
October 30, 2026
Retailer 7$1,733 CAD
Retailer 5$1,755 CAD
Retailer 15$1,819 CAD
Retailer 12$2,064 CAD
Retailer 10$2,561 CAD
Retailer 1$2,829 CAD
Retailer 8$3,692 CAD
Retailer 11$4,234 CAD
Retailer 3$4,659 CAD
Retailer 4$4,842 CAD
Retailer 6$4,933 CAD
Retailer 14$5,267 CAD
Retailer 9$6,486 CAD
Retailer 2$6,610 CAD
Retailer 13$7,922 CAD

43 data points across 15 retailers

16 retailers$1,733 CAD to $7,922 CAD

A
Cheapest Retailer
-
$1,733 CAD
$1,238 USD
A
Retailer 2
-
$1,755 CAD
$1,254 USD
View
Final sale: no returns
A
Retailer 3
-
$2,064 CAD
$1,475 USD
View
B+
Retailer 4
-
$2,561 CAD
$1,830 USD
View
B+
Retailer 5
-
$2,829 CAD
£1,591 GBP
View
B+
Retailer 6
-
$3,692 CAD
ZAR 42,611 ZAR
View
B
Retailer 7
-
$4,659 CAD
$3,329 USD
View
B
Retailer 8
-
$4,842 CAD
£2,724 GBP
View
B
Retailer 9
-
$4,933 CAD
$3,524 USD
View
B
Retailer 10
-
$5,267 CAD
$3,763 USD
View
B
Retailer 11
-
$5,723 CAD
$4,089 USD
View
B
Retailer 12
-
$6,486 CAD
£3,649 GBP
View
B
Retailer 13
-
$6,610 CAD
$4,723 USD
View
B
Retailer 14
-
$7,128 CAD
$5,093 USD
View
B
Retailer 15
-
$7,922 CAD
$5,660 USD
View
Most Expensive
Do Amore Diamonds
27-B8207601F · Oct 29
$13,926 CAD
$9,950 USD
View
Price under review
15 more retailers have this diamond
Prices start from $1,733 CADSave up to $6,189 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
1.78ct Cushion
$1,733 CAD