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Emerald|Lab Grown|IGI

1.51ct H SI1 Emerald Lab Grown Diamond

ID • H/SI1 • IGI LG512222185

Shape and cutting style on the report: Emerald cut

Certificate IGI LG512222185

Diamond specifications and retailer prices

From $553 USD
As of November 1, 2026
Save $617 USD (53%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $1,170 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.51ct lab-grown emerald diamond

This 1.51ct lab-grown emerald sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG512222185 or 512222185. Listed at 2 retailers as of October 31, 2026, with prices from $553 to $1,170, a $617 spread on the same certified stone. Brilliant Earth lists it at $1,170. 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
H
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle25.9°
Pavilion angle39.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG512222185
Dimensions7.42 × 5.41 × 3.72 mm
L/W Ratio1.37
Culet sizeLong
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.42 mm5.41 mm1.51 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG512222185
Side View
Table 65.0%Crown 25.9°Girdle: Slightly ThickPavilion 39.6°Culet: LNGDepth 68.8%

Caratlytics Score

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

Last verified: Nov 1
Current: $1,170 USD|Low: $537 USD|High: $1,170 USD|Avg: $877 USD|+7.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
September 23, 2026
Retailer 2$553 USD
Retailer 3$700 USD
Retailer 4$803 USD
Brilliant Earth$1,170 USD

14 data points across 4 retailers

2 retailers$553 USD to $1,170 USD

A
Cheapest Retailer
-
$553 USD
Most Expensive
B+
Brilliant Earth
11704603Y · Oct 31
$1,170 USD
View
1 more retailer has this diamond
Prices start from $553 USDSave up to $617 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 Emerald
$553 USD