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Emerald|Lab Grown|IGI

1.18ct H SI1 Emerald Lab Grown Diamond

ID • H/SI1 • IGI LG436045918

Shape and cutting style on the report: Emerald cut

Certificate IGI LG436045918

Diamond specifications and retailer prices

From £497 GBP
As of November 6, 2026
Save £1,933 GBP (80%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £2,430 GBP at MOH London · As of November 3, 2026
View at MOH London

About this 1.18ct lab-grown emerald diamond

This 1.18ct 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 LG436045918 or 436045918. Listed at 10 retailers as of November 3, 2026, with prices from £497 to £2,430, a £1,933 spread on the same certified stone. MOH London lists it at £2,430. 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

1.18
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle21.4°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436045918
Dimensions7.34 × 5.02 × 3.32 mm
L/W Ratio1.46
Culet sizeLong
Cert comments
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Top View
7.34 mm5.02 mm1.18 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG436045918
Side View
Table 62.5%Crown 21.4°Girdle: STK-THKPavilion 41.6°Culet: LNGDepth 66.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £2,430 GBP|Low: £477 GBP|High: £2,462 GBP|Avg: £979 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 7£497 GBP
Retailer 2£505 GBP
Retailer 12£541 GBP
Retailer 8£577 GBP
Retailer 11£577 GBP
Retailer 5£710 GBP
Retailer 4£759 GBP
Retailer 3£926 GBP
Retailer 9£939 GBP
Retailer 6£1,473 GBP
Retailer 10£1,622 GBP
MOH London£2,430 GBP

22 data points across 12 retailers

10 retailers£497 GBP to £2,430 GBP

A
Cheapest Retailer
-
£497 GBP
A
Retailer 2
-
£505 GBP
View
A
Retailer 3
-
£541 GBP
View
A
Retailer 4
-
£577 GBP
View
Retailer 5
-
£577 GBP
View
Price last confirmed 21 days ago
A
Retailer 6
-
£710 GBP
View
B+
Retailer 7
-
£939 GBP
View
B
Retailer 8
-
£1,473 GBP
View
B
Retailer 9
-
£1,622 GBP
View
Most Expensive
B
MOH London
LG436045918 · Nov 3
£2,430 GBP
View
9 more retailers have this diamond
Prices start from £497 GBPSave up to £1,933 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
1.18ct Emerald
£497 GBP