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Marquise|Lab Grown|IGI

1.78ct G VS1 Marquise Lab Grown Diamond

ID • G/VS1 • IGI LG836666661

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG836666661

Diamond specifications and retailer prices

From $481 CAD
£271 GBP
As of November 1, 2026
Save $1,824 CAD (79%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $2,305 CAD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

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 G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG836666661 or 836666661. Listed at 12 retailers as of October 31, 2026, with prices from $481 to $2,305, a $1,824 spread on the same certified stone. Brilliant Earth lists it at $2,305. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.78
Carat
G
Color
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG836666661
Dimensions11.86 × 6.55 × 4.04 mm
L/W Ratio1.81
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.86 mm6.55 mm1.78 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG836666661
Side View
Table 60.0%Crown 34.9°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 61.7%

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: Nov 1
Current: $2,305 CAD|Low: $481 CAD|High: $3,045 CAD|Avg: $1,205 CAD|-24.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 5$481 CAD
Retailer 4$694 CAD
Retailer 7$707 CAD
Retailer 9$738 CAD
Retailer 6$779 CAD
Retailer 10$893 CAD
Retailer 8$960 CAD
Retailer 12$1,327 CAD
Retailer 3$1,396 CAD
Retailer 2$1,650 CAD
Retailer 11$1,675 CAD
Brilliant Earth$2,305 CAD

15 data points across 12 retailers

12 retailers$481 CAD to $2,305 CAD

A
Cheapest Retailer
-
$481 CAD
£271 GBP
B+
Retailer 2
-
$694 CAD
$497 USD
View
A
Retailer 3
-
$707 CAD
ZAR 8,178 ZAR
View
A
Retailer 4
-
$738 CAD
€503 EUR
View
A
Retailer 5
-
$779 CAD
£439 GBP
View
A
Retailer 6
-
$893 CAD
$639 USD
View
A
Retailer 7
-
$960 CAD
A$1,057 AUD
View
B+
Retailer 8
-
$1,327 CAD
$950 USD
View
B+
Retailer 9
-
$1,396 CAD
$999 USD
View
B+
Retailer 10
-
$1,650 CAD
£930 GBP
View
B+
Retailer 11
-
$1,675 CAD
$1,199 USD
View
Most Expensive
B
Brilliant Earth
22163644A · Oct 31
$2,305 CAD
$1,650 USD
View
11 more retailers have this diamond
Prices start from $481 CADSave up to $1,824 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
$481 CAD