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Marquise|Lab Grown|IGI

1.51ct E SI1 Marquise Lab Grown Diamond

VG • E/SI1 • IGI LG838620229

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG838620229

Diamond specifications and retailer prices

From $223 USD
As of October 30, 2026
Save $927 USD (81%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $1,150 USD at Brilliant Earth · As of October 31, 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 LG838620229 or 838620229. Listed at 3 retailers as of October 30, 2026, with prices from $223 to $1,150, a $927 spread on the same certified stone. Brilliant Earth lists it at $1,150. 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 angle35.8°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG838620229
Dimensions11.67 × 6.15 × 3.74 mm
L/W Ratio1.90
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.67 mm6.15 mm1.51 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG838620229
Side View
Table 63.0%Crown 35.8°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 60.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: $1,150 USD|Low: $223 USD|High: $1,760 USD|Avg: $946 USD|-34.7%
Brilliant Earth
Retailer 2
Retailer 3
November 1, 2026
Retailer 3$223 USD
Retailer 2$470 USD
Brilliant Earth$1,150 USD

32 data points across 3 retailers

3 retailers$223 USD to $1,150 USD

A
Cheapest Retailer
-
$223 USD
Final sale: no returns
A
Retailer 2
-
$470 USD
£370 GBP
View
Most Expensive
B
Brilliant Earth
21541954A · Oct 31
$1,150 USD
View
2 more retailers have this diamond
Prices start from $223 USDSave up to $927 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
$223 USD