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Marquise|Lab Grown|IGI

3.80ct E SI1 Marquise Lab Grown Diamond

EX • E/SI1 • IGI LG812617978

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG812617978

Diamond specifications and retailer prices

From $717 CAD
$512 USD
As of October 29, 2026
Save $7,303 CAD (91%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $8,020 CAD at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 3.8ct lab-grown marquise diamond

This 3.8ct lab-grown marquise sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG812617978 or 812617978. Listed at 3 retailers as of October 28, 2026, with prices from $717 to $8,020, a $7,303 spread on the same certified stone. Brilliant Earth lists it at $8,020. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

3.80
Carat
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG812617978
Dimensions16.56 × 8.06 × 5.03 mm
L/W Ratio2.05
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.56 mm8.06 mm3.80 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG812617978
Side View
Table 59.0%Crown 34.7°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 62.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 29
Current: $8,020 CAD|Low: $717 CAD|High: $8,034 CAD|Avg: $3,417 CAD
Brilliant Earth
Retailer 2
Retailer 3
October 30, 2026
Retailer 3$717 CAD
Retailer 2$1,361 CAD
Brilliant Earth$8,020 CAD

35 data points across 3 retailers

3 retailers$717 CAD to $8,020 CAD

A
Cheapest Retailer
-
$717 CAD
$512 USD
Final sale: no returns
A
Retailer 2
-
$1,361 CAD
£766 GBP
View
Most Expensive
B
Brilliant Earth
21226659A · Oct 28
$8,020 CAD
$5,730 USD
View
2 more retailers have this diamond
Prices start from $717 CADSave up to $7,303 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
3.80ct Marquise
$717 CAD