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Marquise|Lab Grown|IGI

0.37ct E SI1 Marquise Lab Grown Diamond

VG • E/SI1 • IGI LG302820021

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG302820021

Diamond specifications and retailer prices

From $270 USD
As of October 28, 2026
1 retailer carries this diamond
Only listing: $270 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 0.37ct lab-grown marquise diamond

This 0.37ct lab-grown marquise sits in the sub-half-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG302820021 or 302820021. Listed at a single retailer as of October 28, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.37
Carat
E
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryGood
FluorescenceNone
Crown angle33.6°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG302820021
Dimensions8.19 × 3.67 × 2.18 mm
L/W Ratio2.23
Culet sizeNone
Top View
8.19 mm3.67 mm0.37 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateIGI LG302820021
Side View
Table 59.0%Crown 33.6°Girdle: THN-THKPavilion 40.3°Culet: NoneDepth 59.4%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 28
Current: $270 USD|Low: $208 USD|High: $290 USD|Avg: $252 USD|-6.9%
Brilliant Earth
Retailer 2
July 26, 2026
Retailer 2$208 USD
Brilliant Earth$270 USD

19 data points across 2 retailers

1 retailer

B
Brilliant Earth
4040500Y · Oct 28
$270 USD
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B
0.37ct Marquise
$270 USD