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Marquise|Lab Grown|IGI

1.51ct E SI1 Marquise Lab Grown Diamond

VG • E/SI1 • IGI LG828606183

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG828606183

Diamond specifications and retailer prices

From $232 USD
As of October 30, 2026
Save $1,478 USD (86%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $1,710 USD at Brilliant Earth · As of October 26, 2026
View at Brilliant Earth

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 very-good cut grade and certified by IGI LG828606183 or 828606183. Listed at 3 retailers as of October 26, 2026, with prices from $232 to $1,710, a $1,478 spread on the same certified stone. Brilliant Earth lists it at $1,710. 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

1.51
Carat
E
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG828606183
Dimensions11.47 × 5.93 × 3.78 mm
L/W Ratio1.93
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.47 mm5.93 mm1.51 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG828606183
Side View
Table 61.0%Crown 35.9°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 63.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: $1,710 USD|Low: $232 USD|High: $1,710 USD|Avg: $659 USD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 27, 2026
Retailer 3$232 USD
Retailer 5$443 USD
Retailer 4$462 USD
Retailer 2$476 USD
Brilliant Earth$1,710 USD

33 data points across 5 retailers

3 retailers$232 USD to $1,710 USD

A
Cheapest Retailer
-
$232 USD
Final sale: no returns
A
Retailer 2
-
$476 USD
£375 GBP
View
Most Expensive
C
Brilliant Earth
21227887A · Oct 26
$1,710 USD
View
2 more retailers have this diamond
Prices start from $232 USDSave up to $1,478 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
$232 USD