Emerald|Lab Grown|IGI

1.66ct J SI1 Emerald Lab Grown Diamond

ID • J/SI1 • IGI LG425067414

Shape and cutting style on the report: Emerald cut

Certificate IGI LG425067414

Diamond specifications and retailer prices

From £686 GBP
$920 USD
As of November 2, 2026
Save £3,243 GBP (83%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,928 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.66ct lab-grown emerald diamond

This 1.66ct lab-grown emerald sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG425067414 or 425067414. Listed at 11 retailers as of November 1, 2026, with prices from £686 to £3,928, a £3,243 spread on the same certified stone. MOH London lists it at £3,928. 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

1.66
Carat
J
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle28.1°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG425067414
Dimensions7.98 × 5.55 × 3.80 mm
L/W Ratio1.44
Culet sizeLong
Cert comments
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Top View
7.98 mm5.55 mm1.66 ctJ / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG425067414
Side View
Table 61.5%Crown 28.1°Girdle: Slightly ThickPavilion 40.5°Culet: LNGDepth 68.5%

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 2
Current: £3,928 GBP|Low: £686 GBP|High: £3,981 GBP|Avg: £1,948 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
Retailer 13
Retailer 14
November 1, 2026
Retailer 2£686 GBP
Retailer 8£1,186 GBP
Retailer 13£1,290 GBP
Retailer 14£1,328 GBP
Retailer 9£1,376 GBP
Retailer 12£1,376 GBP
Retailer 6£1,418 GBP
Retailer 3£1,502 GBP
Retailer 4£1,853 GBP
Retailer 10£2,164 GBP
Retailer 7£2,432 GBP
Retailer 11£2,578 GBP
MOH London£3,928 GBP
Retailer 5£3,939 GBP

21 data points across 14 retailers

11 retailers£686 GBP to £3,928 GBP

A
Cheapest Retailer
-
£686 GBP
$920 USD
B+
Retailer 2
-
£1,186 GBP
$1,591 USD
View
B+
Retailer 3
-
£1,290 GBP
$1,731 USD
View
B+
Retailer 4
-
£1,328 GBP
$1,782 USD
View
Final sale: no returns
B+
Retailer 5
-
£1,376 GBP
$1,846 USD
View
Retailer 6
-
£1,376 GBP
$1,846 USD
View
Price last confirmed 20 days ago
B
Retailer 7
-
£1,502 GBP
$2,015 USD
View
B
Retailer 8
-
£2,164 GBP
$2,904 USD
View
B
Retailer 9
-
£2,432 GBP
$3,264 USD
View
B
Retailer 10
-
£2,578 GBP
$3,460 USD
View
Most Expensive
B
MOH London
LG425067414 · Nov 1
£3,928 GBP
View
10 more retailers have this diamond
Prices start from £686 GBPSave up to £3,243 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
1.66ct Emerald
£686 GBP