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Marquise|Lab Grown|IGI

1.21ct E SI1 Marquise Lab Grown Diamond

EX • E/SI1 • IGI LG816673640

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG816673640

Diamond specifications and retailer prices

From $263 CAD
As of November 4, 2026
Save $1,103 CAD (81%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,366 CAD at MOH London · As of November 1, 2026
View at MOH London

About this 1.21ct lab-grown marquise diamond

This 1.21ct lab-grown marquise sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG816673640 or 816673640. Listed at 8 retailers as of November 1, 2026, with prices from $263 to $1,366, a $1,103 spread on the same certified stone. MOH London lists it at $1,366. 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

1.21
Carat
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816673640
Dimensions11.44 × 5.59 × 3.44 mm
L/W Ratio2.05
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.44 mm5.59 mm1.21 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816673640
Side View
Table 61.0%Crown 33.3°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 61.5%

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: Nov 4
Current: $1,366 CAD|Low: $258 CAD|High: $1,368 CAD|Avg: $697 CAD|+1.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 5$263 CAD
Retailer 3$376 CAD
Retailer 2$514 CAD
Retailer 7$524 CAD
Retailer 4$554 CAD
Retailer 6$992 CAD
Retailer 8$1,015 CAD
MOH London$1,366 CAD

17 data points across 8 retailers

8 retailers$263 CAD to $1,366 CAD

A
Cheapest Retailer
-
$263 CAD
Final sale: no returns
A
Retailer 2
-
$376 CAD
View
A
Retailer 3
-
$514 CAD
View
A
Retailer 4
-
$524 CAD
View
B+
Retailer 5
-
$554 CAD
View
B
Retailer 6
-
$992 CAD
View
B
Retailer 7
-
$1,015 CAD
View
Most Expensive
B
MOH London
LG816673640 · Nov 1
$1,366 CAD
£770 GBP
View
7 more retailers have this diamond
Prices start from $263 CADSave up to $1,103 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
1.21ct Marquise
$263 CAD