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Marquise|Lab Grown|IGI

1.50ct E SI1 Marquise Lab Grown Diamond

ID • E/SI1 • IGI LG840628028

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG840628028

Diamond specifications and retailer prices

From $345 USD
As of October 26, 2026
Save $827 USD (71%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $1,172 USD at MOH London · As of October 26, 2026
View at MOH London

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 LG840628028 or 840628028. Listed at 4 retailers as of October 26, 2026, with prices from $345 to $1,172, a $827 spread on the same certified stone. MOH London lists it at $1,172. 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
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840628028
Dimensions11.94 × 5.78 × 3.79 mm
L/W Ratio2.07
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.94 mm5.78 mm1.50 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840628028
Side View
Table 59.0%Crown 34.1°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 65.6%

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: Oct 26
Current: $1,172 USD|Low: $345 USD|High: $1,172 USD|Avg: $657 USD
MOH London
Retailer 2
Retailer 3
Retailer 4
October 27, 2026
Retailer 4$345 USD
Retailer 2$450 USD
Retailer 3$457 USD
MOH London$1,172 USD

2 data points across 4 retailers

4 retailers$345 USD to $1,172 USD

B+
Cheapest Retailer
-
$345 USD
A
Retailer 2
-
$450 USD
View
A
Retailer 3
-
$457 USD
£360 GBP
View
Most Expensive
B
MOH London
LG840628028 · Oct 26
$1,172 USD
£923 GBP
View
3 more retailers have this diamond
Prices start from $345 USDSave up to $827 USD

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
1.50ct Marquise
$345 USD