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Emerald|Lab Grown|IGI

1.20ct H SI1 Emerald Lab Grown Diamond

ID • H/SI1 • IGI LG605335110

Shape and cutting style on the report: Emerald cut

Certificate IGI LG605335110

Diamond specifications and retailer prices

From £364 GBP
As of November 5, 2026
Save £149 GBP (29%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £513 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.2ct lab-grown emerald diamond

This 1.2ct lab-grown emerald sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG605335110 or 605335110. Listed at 2 retailers as of November 4, 2026, with prices from £364 to £513, a £149 spread on the same certified stone. Brilliant Earth lists it at £513. 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

1.20
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle38.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG605335110
Dimensions8.03 × 4.76 × 3.15 mm
L/W Ratio1.69
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
8.03 mm4.76 mm1.20 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG605335110
Side View
Table 60.0%Crown 34°Girdle: MediumPavilion 38.4°Culet: LargeDepth 66.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: £513 GBP|Low: £364 GBP|High: £513 GBP|Avg: £449 GBP
Brilliant Earth
Retailer 2
Retailer 3
December 30, 2025
Retailer 2£364 GBP
Retailer 3£452 GBP
Brilliant Earth£513 GBP

6 data points across 3 retailers

2 retailers£364 GBP to £513 GBP

A
Cheapest Retailer
-
£364 GBP
Most Expensive
B+
Brilliant Earth
13742348A · Nov 4
£513 GBP
$690 USD
View
1 more retailer has this diamond
Prices start from £364 GBPSave up to £149 GBP

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
1.20ct Emerald
£364 GBP