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Emerald|Lab Grown|IGI

1.78ct G SI1 Emerald Lab Grown Diamond

VG • G/SI1 • IGI LG559257674

Shape and cutting style on the report: Emerald cut

Certificate IGI LG559257674

Diamond specifications and retailer prices

From £1,498 GBP
$1,990 USD
As of October 28, 2026
1 retailer carries this diamond
Only listing: £1,498 GBP 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 1.78ct lab-grown emerald diamond

This 1.78ct lab-grown emerald sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG559257674 or 559257674. 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

1.78
Carat
G
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle39.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG559257674
Dimensions8.10 × 5.76 × 3.90 mm
L/W Ratio1.41
Culet sizeLarge
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
8.10 mm5.76 mm1.78 ctG / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG559257674
Side View
Table 66.0%Crown 34.6°Girdle: Slightly ThickPavilion 39.4°Culet: LargeDepth 67.7%

Caratlytics Score

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C
Average
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Price History

Last verified: Oct 28
Current: £1,498 GBP|Low: £1,498 GBP|High: £1,626 GBP|Avg: £1,599 GBP|-7.9%
October 7, 2026
Brilliant Earth£1,498 GBP

8 data points across 1 retailer

1 retailer

C
Brilliant Earth
6560803Y · Oct 28
£1,498 GBP
$1,990 USD
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C
1.78ct Emerald
£1,498 GBP