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Marquise|Lab Grown|IGI

1.51ct E SI1 Marquise Lab Grown Diamond

ID • E/SI1 • IGI LG850606792

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG850606792

Diamond specifications and retailer prices

From $437 USD
As of November 1, 2026
Save $743 USD (63%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $1,180 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1.51ct lab-grown marquise diamond

This 1.51ct 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 LG850606792 or 850606792. Listed at 4 retailers as of November 1, 2026, with prices from $437 to $1,180, a $743 spread on the same certified stone. MOH London lists it at $1,180. 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

1.51
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG850606792
Dimensions11.31 × 6.09 × 3.82 mm
L/W Ratio1.86
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.31 mm6.09 mm1.51 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG850606792
Side View
Table 59.0%Crown 34.1°Girdle: MED-STKPavilion 39.9°Culet: NoneDepth 62.7%

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 1
Current: $1,180 USD|Low: $437 USD|High: $1,186 USD|Avg: $634 USD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 1, 2026
Retailer 4$437 USD
Retailer 3$456 USD
Retailer 2$464 USD
MOH London$1,180 USD

7 data points across 4 retailers

4 retailers$437 USD to $1,180 USD

B+
Cheapest Retailer
-
$437 USD
A
Retailer 2
-
$456 USD
View
A
Retailer 3
-
$464 USD
£365 GBP
View
Most Expensive
B
MOH London
LG850606792 · Nov 1
$1,180 USD
£929 GBP
View
3 more retailers have this diamond
Prices start from $437 USDSave up to $743 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
1.51ct Marquise
$437 USD