Emerald|Lab Grown|IGI

0.42ct F SI1 Emerald Lab Grown Diamond

ID • F/SI1 • IGI LG816671081

Shape and cutting style on the report: Emerald cut

Certificate IGI LG816671081

Diamond specifications and retailer prices

From £61 GBP
$82 USD
As of October 29, 2026
Save £363 GBP (86%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £425 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 0.42ct lab-grown emerald diamond

This 0.42ct lab-grown emerald sits in the sub-half-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG816671081 or 816671081. Listed at 15 retailers as of October 26, 2026, with prices from £61 to £425, a £363 spread on the same certified stone. MOH London lists it at £425. 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

0.42
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle30.3°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816671081
Dimensions5.85 × 3.86 × 2.37 mm
L/W Ratio1.52
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
5.85 mm3.86 mm0.42 ctF / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG816671081
Side View
Table 74.0%Crown 30.3°Girdle: ThickPavilion 41.6°Culet: LargeDepth 65.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 29
Current: £425 GBP|Low: £63 GBP|High: £586 GBP|Avg: £224 GBP|-26.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 29, 2026
Retailer 8£63 GBP
Retailer 3£95 GBP
Retailer 2£122 GBP
Retailer 7£139 GBP
Retailer 4£139 GBP
Retailer 5£146 GBP
Retailer 6£231 GBP
Retailer 9£231 GBP
MOH London£425 GBP

31 data points across 9 retailers

15 retailers£61 GBP to £425 GBP

Retailer 1
-
£54 GBP
$72 USD
Price last confirmed 8 days ago
A
Retailer 2
-
£61 GBP
$82 USD
View
Retailer 3
-
£63 GBP
$85 USD
View
Price last confirmed 21 days ago
Retailer 4
-
£74 GBP
$99 USD
View
Price last confirmed 22 days ago
Retailer 5
-
£84 GBP
$112 USD
View
Price last confirmed 33 days ago
A
Retailer 6
-
£95 GBP
View
A
Retailer 7
-
£122 GBP
€156 EUR
View
Retailer 8
-
£136 GBP
View
Price last confirmed 20 days ago
Retailer 9
-
£139 GBP
$186 USD
View
Price last confirmed 7 days ago
A
Retailer 10
-
£139 GBP
View
B+
Retailer 11
-
£146 GBP
$195 USD
View
B
Retailer 12
-
£231 GBP
$310 USD
View
Retailer 13
-
£231 GBP
$310 USD
View
Price last confirmed 20 days ago
Retailer 14
-
£253 GBP
$339 USD
View
Price last confirmed 25 days ago
Most Expensive
B
MOH London
LG816671081 · Oct 26
£425 GBP
View
14 more retailers have this diamond
Prices start from £61 GBPSave up to £363 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
0.42ct Emerald
£61 GBP