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Emerald|Lab Grown|IGI

1.66ct E SI1 Emerald Lab Grown Diamond

ID • E/SI1 • IGI LG626437419

Shape and cutting style on the report: Emerald cut

Certificate IGI LG626437419

Diamond specifications and retailer prices

From £158 GBP
$212 USD
As of October 30, 2026
Save £752 GBP (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £911 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG626437419 or 626437419. Listed at 15 retailers as of October 30, 2026, with prices from £158 to £911, a £752 spread on the same certified stone. Brilliant Earth lists it at £911. 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
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle43.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG626437419
Dimensions8.31 × 5.68 × 3.72 mm
L/W Ratio1.46
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
8.31 mm5.68 mm1.66 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG626437419
Side View
Table 64.0%Crown 34.7°Girdle: MediumPavilion 43.6°Culet: LNGDepth 65.5%

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: Oct 30
Current: £911 GBP|Low: £131 GBP|High: £955 GBP|Avg: £462 GBP|-4.7%
Brilliant Earth
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 3£158 GBP
Retailer 10£184 GBP
Retailer 12£196 GBP
Retailer 13£196 GBP
Retailer 8£305 GBP
Retailer 5£338 GBP
Retailer 7£364 GBP
Retailer 4£447 GBP
Retailer 14£632 GBP
Retailer 11£634 GBP
Retailer 2£683 GBP
Retailer 9£792 GBP
Retailer 6£823 GBP
Brilliant Earth£911 GBP

40 data points across 14 retailers

15 retailers£158 GBP to £911 GBP

A
Cheapest Retailer
-
£158 GBP
$212 USD
A
Retailer 2
-
£184 GBP
$246 USD
View
A
Retailer 3
-
£196 GBP
$263 USD
View
Retailer 4
-
£196 GBP
$263 USD
View
Price last confirmed 7 days ago
A
Retailer 5
-
£305 GBP
€389 EUR
View
B+
Retailer 6
-
£338 GBP
$453 USD
View
B+
Retailer 7
-
£364 GBP
View
B+
Retailer 8
-
£447 GBP
$599 USD
View
B
Retailer 9
-
£632 GBP
$847 USD
View
B
Retailer 10
-
£634 GBP
$850 USD
View
Retailer 11
-
£675 GBP
$905 USD
View
B
Retailer 12
-
£683 GBP
$915 USD
View
B
Retailer 13
-
£792 GBP
View
B
Retailer 14
-
£823 GBP
$1,103 USD
View
Most Expensive
B
Brilliant Earth
9811875A · Oct 31
£911 GBP
$1,220 USD
View
14 more retailers have this diamond
Prices start from £158 GBPSave up to £752 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
£158 GBP