Marquise|Lab Grown|IGI

1.50ct I SI1 Marquise Lab Grown Diamond

ID • I/SI1 • IGI LG436073659

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG436073659

Diamond specifications and retailer prices

From $1,050 USD
As of October 31, 2026
1 retailer carries this diamond
Only listing: $1,050 USD at Brilliant Earth
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Brilliant Earth

About this 1.5ct lab-grown marquise diamond

This 1.5ct lab-grown marquise sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436073659 or 436073659. Listed at a single retailer as of October 31, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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

1.50
Carat
I
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436073659
Dimensions10.83 × 5.99 × 3.86 mm
L/W Ratio1.81
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
10.83 mm5.99 mm1.50 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436073659
Side View
Table 61.0%Crown 35.7°Girdle: THK-VTKPavilion 41.1°Culet: NoneDepth 64.4%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 31
Current: $1,050 USD|Low: $1,050 USD|High: $4,342 USD|Avg: $2,710 USD|-41.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
June 13, 2026
Brilliant Earth$1,050 USD
Retailer 2$1,087 USD
Retailer 3$1,675 USD
Retailer 4$2,072 USD
Retailer 5$2,339 USD
Retailer 7$2,858 USD
Retailer 6$4,304 USD

28 data points across 7 retailers

1 retailer

B+
Brilliant Earth
8354358A · Oct 31
$1,050 USD
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B+
1.50ct Marquise
$1,050 USD