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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 $759 USD
As of November 1, 2026
Save $1,334 USD (64%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $3,298 USD at MOH London · As of November 1, 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 October 31, 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
Color
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 1
Current: $3,298 USD|Low: $728 USD|High: $3,343 USD|Avg: $1,354 USD
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$759 USD
Retailer 12$825 USD
Retailer 3$848 USD
Retailer 8$880 USD
Retailer 11$880 USD
Retailer 5$890 USD
Retailer 4$1,055 USD
Retailer 2$1,348 USD
Retailer 9$1,424 USD
Retailer 6$2,093 USD
Retailer 10$2,474 USD
MOH London$3,298 USD

42 data points across 12 retailers

12 retailers$759 USD to $2,093 USD

B+
Cheapest Retailer
-
$759 USD
B
Retailer 2
-
$825 USD
View
B
Retailer 3
-
$848 USD
View
Final sale: no returns
B
Retailer 4
-
$880 USD
View
Retailer 5
-
$880 USD
View
Price last confirmed 20 days ago
B
Retailer 6
-
$890 USD
View
B
Retailer 7
-
$1,055 USD
View
B
Retailer 8
-
$1,348 USD
£1,061 GBP
View
B
Retailer 9
-
$1,424 USD
View
B
Retailer 10
-
$2,093 USD
View
Retailer 11
-
$2,474 USD
View
Price under review
Most Expensive
MOH London
LG500144859 · Nov 1
$3,298 USD
£2,597 GBP
View
Price under review
11 more retailers have this diamond
Prices start from $759 USDSave up to $1,334 USD

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
$759 USD