CaratHunter
Plans
Marquise|Lab Grown|IGI

1.78ct E IF Marquise Lab Grown Diamond

EX • E/IF • IGI LG780664014

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG780664014

Diamond specifications and retailer prices

From $2,561 CAD
$1,830 USD
As of October 30, 2026
Save $7,013 CAD (73%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $14,030 CAD at With Clarity · As of October 28, 2026
View at With Clarity

About this 1.78ct lab-grown marquise diamond

This 1.78ct lab-grown marquise sits in the one-and-a-half to two carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG780664014 or 780664014. Listed at 15 retailers as of October 30, 2026, with a 274% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.78
Carat
E
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780664014
Dimensions12.38 × 6.33 × 4.01 mm
L/W Ratio1.96
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
12.38 mm6.33 mm1.78 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780664014
Side View
Table 57.0%Crown 36.5°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 63.3%

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: Oct 30
Current: $3,855 CAD|Low: $2,931 CAD|High: $7,896 CAD|Avg: $5,163 CAD|-0.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 2$2,931 CAD
Retailer 7$3,471 CAD
Retailer 1$3,855 CAD
Retailer 9$4,118 CAD
Retailer 5$4,346 CAD
Retailer 4$5,016 CAD
Retailer 10$5,249 CAD
Retailer 8$5,314 CAD
Retailer 3$7,125 CAD
Retailer 11$7,352 CAD
Retailer 6$7,833 CAD

41 data points across 11 retailers

15 retailers$2,561 CAD to $9,575 CAD

A
Cheapest Retailer
-
$2,561 CAD
$1,830 USD
A
Retailer 2
-
$2,931 CAD
$2,094 USD
View
B+
Retailer 3
-
$3,332 CAD
HK$18,600 HKD
View
B+
Retailer 4
-
$3,471 CAD
$2,480 USD
View
B+
Retailer 5
-
$3,855 CAD
£2,169 GBP
View
B+
Retailer 6
-
$4,118 CAD
$2,942 USD
View
B+
Retailer 7
-
$4,346 CAD
€2,957 EUR
View
B+
Retailer 8
-
$5,016 CAD
ZAR 57,894 ZAR
View
B
Retailer 9
-
$5,249 CAD
$3,750 USD
View
Retailer 10
-
$5,314 CAD
A$5,841 AUD
View
Price last confirmed 21 days ago
B
Retailer 11
-
$7,125 CAD
$5,091 USD
View
B
Retailer 12
-
$7,352 CAD
$5,253 USD
View
B
Retailer 13
-
$7,833 CAD
£4,407 GBP
View
B
Retailer 14
-
$9,575 CAD
$6,841 USD
View
Most Expensive
With Clarity
780664014 · Oct 28
$14,030 CAD
$10,024 USD
View
Price under review
14 more retailers have this diamond
Prices start from $2,561 CADSave up to $7,013 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 Marquise
$2,561 CAD