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Marquise|Lab Grown|IGI

1.50ct E SI1 Marquise Lab Grown Diamond

ID • E/SI1 • IGI LG764684158

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG764684158

Diamond specifications and retailer prices

From $1,680 USD
As of October 31, 2026
1 retailer carries this diamond
Only listing: $1,680 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG764684158 or 764684158. 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
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle31.3°
Pavilion angle37.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG764684158
Dimensions12.29 × 6.05 × 3.45 mm
L/W Ratio2.03
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.29 mm6.05 mm1.50 ctE / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG764684158
Side View
Table 59.0%Crown 31.3°Girdle: STK-THKPavilion 37.4°Culet: NoneDepth 57.0%

Caratlytics Score

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C
Average
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Price History

Last verified: Oct 31
Current: $1,680 USD|Low: $529 USD|High: $1,840 USD|Avg: $868 USD|-8.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 4, 2026
Retailer 5$529 USD
Retailer 3$614 USD
Retailer 2$617 USD
Retailer 4$1,157 USD
Brilliant Earth$1,680 USD

30 data points across 5 retailers

1 retailer

C
Brilliant Earth
19902814B · Oct 31
$1,680 USD
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C
1.50ct Marquise
$1,680 USD