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Marquise|Lab Grown|IGI

3.78ct G VS1 Marquise Lab Grown Diamond

EX • G/VS1 • IGI LG813604687

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG813604687

Diamond specifications and retailer prices

From $704 CAD
$504 USD
As of October 31, 2026
Save $4,241 CAD (86%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $4,945 CAD at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 3.78ct lab-grown marquise diamond

This 3.78ct lab-grown marquise sits in the three to five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG813604687 or 813604687. Listed at 4 retailers as of October 28, 2026, with prices from $704 to $4,945, a $4,241 spread on the same certified stone. Brilliant Earth lists it at $4,945. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.78
Carat
G
Color
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG813604687
Dimensions16.72 × 8.11 × 4.98 mm
L/W Ratio2.06
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.72 mm8.11 mm3.78 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG813604687
Side View
Table 61.0%Crown 35°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 61.4%

Caratlytics Score

How it works →
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 31
Current: $4,945 CAD|Low: $696 CAD|High: $5,099 CAD|Avg: $3,199 CAD|-3.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
October 31, 2026
Retailer 3$704 CAD
Retailer 2$1,337 CAD
Retailer 4$4,428 CAD
Brilliant Earth$4,945 CAD

37 data points across 4 retailers

4 retailers$704 CAD to $4,945 CAD

A
Cheapest Retailer
-
$704 CAD
$504 USD
Final sale: no returns
A
Retailer 2
-
$1,337 CAD
£753 GBP
View
Retailer 3
-
$4,428 CAD
$3,170 USD
View
Price last confirmed 13 days ago
Most Expensive
B
Brilliant Earth
21263694A · Oct 28
$4,945 CAD
$3,540 USD
View
3 more retailers have this diamond
Prices start from $704 CADSave up to $4,241 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
3.78ct Marquise
$704 CAD