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Emerald|Lab Grown|IGI

1.66ct E SI1 Emerald Lab Grown Diamond

ID • E/SI1 • IGI LG593300900

Shape and cutting style on the report: Emerald cut

Certificate IGI LG593300900

Diamond specifications and retailer prices

From £143 GBP
$191 USD
As of October 27, 2026
Save £1,223 GBP (90%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £1,366 GBP at Do Amore Diamonds · As of October 27, 2026
View at Do Amore Diamonds

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 LG593300900 or 593300900. Listed at 8 retailers as of October 27, 2026, with prices from £143 to £1,366, a £1,223 spread on the same certified stone. Do Amore Diamonds lists it at £1,366. 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 angle37.2°
Pavilion angle41.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG593300900
Dimensions8.09 × 5.61 × 3.75 mm
L/W Ratio1.44
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
8.09 mm5.61 mm1.66 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG593300900
Side View
Table 63.0%Crown 37.2°Girdle: MediumPavilion 41.9°Culet: LNGDepth 66.8%

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 27
Current: £1,366 GBP|Low: £110 GBP|High: £1,388 GBP|Avg: £540 GBP|-1.6%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 21, 2026
Retailer 7£143 GBP
Retailer 9£162 GBP
Retailer 6£166 GBP
Retailer 5£310 GBP
Retailer 10£568 GBP
Retailer 4£571 GBP
Retailer 8£628 GBP
Retailer 3£683 GBP
Retailer 2£787 GBP
Do Amore Diamonds£1,366 GBP

18 data points across 10 retailers

8 retailers£143 GBP to £1,366 GBP

A
Cheapest Retailer
-
£143 GBP
$191 USD
A
Retailer 2
-
£166 GBP
$222 USD
View
B+
Retailer 3
-
£310 GBP
$415 USD
View
B+
Retailer 4
-
£571 GBP
$765 USD
View
B+
Retailer 5
-
£628 GBP
$841 USD
View
Retailer 6
-
£657 GBP
$880 USD
View
Price last confirmed 12 days ago
Retailer 7
-
£787 GBP
View
Price last confirmed 10 days ago
Most Expensive
B
Do Amore Diamonds
27-B6124BE47 · Oct 27
£1,366 GBP
$1,830 USD
View
7 more retailers have this diamond
Prices start from £143 GBPSave up to £1,223 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
£143 GBP