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Marquise|Lab Grown|IGI

3.09ct E SI1 Marquise Lab Grown Diamond

EX • E/SI1 • IGI LG839649815

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG839649815

Diamond specifications and retailer prices

From $790 USD
£622 GBP
As of October 30, 2026
Save $2,010 USD (72%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $2,800 USD at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 3.09ct lab-grown marquise diamond

This 3.09ct lab-grown marquise sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG839649815 or 839649815. Listed at 2 retailers as of October 28, 2026, with prices from $790 to $2,800, a $2,010 spread on the same certified stone. Brilliant Earth lists it at $2,800. 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

3.09
Carat
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839649815
Dimensions15.07 × 7.62 × 4.85 mm
L/W Ratio1.98
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
15.07 mm7.62 mm3.09 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839649815
Side View
Table 60.0%Crown 34.5°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 63.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: $2,800 USD|Low: $785 USD|High: $2,800 USD|Avg: $1,715 USD
Brilliant Earth
Retailer 2
October 30, 2026
Retailer 2$790 USD
Brilliant Earth$2,800 USD

18 data points across 2 retailers

2 retailers$790 USD to $2,800 USD

A
Cheapest Retailer
-
$790 USD
£622 GBP
Most Expensive
B
Brilliant Earth
21582761A · Oct 28
$2,800 USD
View
1 more retailer has this diamond
Prices start from $790 USDSave up to $2,010 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
3.09ct Marquise
$790 USD