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Emerald|Lab Grown|IGI

1.21ct F SI1 Emerald Lab Grown Diamond

ID • F/SI1 • IGI LG500144859

Shape and cutting style on the report: Emerald cut

Certificate IGI LG500144859

Diamond specifications and retailer prices

From £564 GBP
As of November 6, 2026
Save £991 GBP (64%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £2,444 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 1.21ct lab-grown emerald diamond

This 1.21ct lab-grown emerald sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG500144859 or 500144859. Listed at 12 retailers as of November 4, 2026, with a 176% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.21
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle25.5°
Pavilion angle37.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG500144859
Dimensions7.60 × 5.02 × 3.12 mm
L/W Ratio1.51
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
7.60 mm5.02 mm1.21 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG500144859
Side View
Table 68.5%Crown 25.5°Girdle: MediumPavilion 37.6°Culet: LNGDepth 62.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £2,444 GBP|Low: £541 GBP|High: £2,484 GBP|Avg: £1,015 GBP|-0.3%
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 5, 2026
Retailer 7£564 GBP
Retailer 12£613 GBP
Retailer 3£630 GBP
Retailer 8£654 GBP
Retailer 11£654 GBP
Retailer 5£661 GBP
Retailer 4£784 GBP
Retailer 2£991 GBP
Retailer 9£1,058 GBP
Retailer 6£1,555 GBP
Retailer 10£1,838 GBP
MOH London£2,444 GBP

43 data points across 12 retailers

12 retailers£564 GBP to £1,555 GBP

B+
Cheapest Retailer
-
£564 GBP
B
Retailer 2
-
£613 GBP
View
B
Retailer 3
-
£630 GBP
View
Final sale: no returns
B
Retailer 4
-
£654 GBP
View
Retailer 5
-
£654 GBP
View
Price last confirmed 25 days ago
B
Retailer 6
-
£661 GBP
View
B
Retailer 7
-
£784 GBP
View
B
Retailer 8
-
£991 GBP
View
B
Retailer 9
-
£1,058 GBP
View
B
Retailer 10
-
£1,555 GBP
View
Retailer 11
-
£1,838 GBP
View
Price under review
Most Expensive
MOH London
LG500144859 · Nov 5
£2,444 GBP
View
Price under review
11 more retailers have this diamond
Prices start from £564 GBPSave up to £991 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.

B+
1.21ct Emerald
£564 GBP