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Marquise|Lab Grown|IGI

1.57ct F SI1 Marquise Lab Grown Diamond

EX • F/SI1 • IGI LG840612730

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG840612730

Diamond specifications and retailer prices

From $319 CAD
$228 USD
As of November 1, 2026
Save $1,386 CAD (81%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $1,705 CAD at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.57ct lab-grown marquise diamond

This 1.57ct lab-grown marquise sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG840612730 or 840612730. Listed at 3 retailers as of November 1, 2026, with prices from $319 to $1,705, a $1,386 spread on the same certified stone. Brilliant Earth lists it at $1,705. 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

1.57
Carat
F
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840612730
Dimensions11.74 × 6.21 × 3.79 mm
L/W Ratio1.89
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.74 mm6.21 mm1.57 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840612730
Side View
Table 62.0%Crown 34.3°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 61.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: $1,705 CAD|Low: $319 CAD|High: $2,431 CAD|Avg: $1,223 CAD|-29.9%
Brilliant Earth
Retailer 2
Retailer 3
November 2, 2026
Retailer 3$319 CAD
Retailer 2$666 CAD
Brilliant Earth$1,705 CAD

29 data points across 3 retailers

3 retailers$319 CAD to $1,705 CAD

A
Cheapest Retailer
-
$319 CAD
$228 USD
Final sale: no returns
A
Retailer 2
-
$666 CAD
£375 GBP
View
Most Expensive
B
Brilliant Earth
21613865A · Nov 2
$1,705 CAD
$1,220 USD
View
2 more retailers have this diamond
Prices start from $319 CADSave up to $1,386 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
1.57ct Marquise
$319 CAD