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Emerald|Lab Grown|IGI

1.66ct E IF Emerald Lab Grown Diamond

ID • E/IF • IGI LG680560448

Shape and cutting style on the report: Emerald cut

Certificate IGI LG680560448

Diamond specifications and retailer prices

From £172 GBP
$230 USD
As of October 30, 2026
Save £708 GBP (80%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,773 GBP at Rare Carat · As of October 18, 2026
View at Rare Carat

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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG680560448 or 680560448. Listed at 18 retailers as of October 30, 2026, with a 413% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.66
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle39.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG680560448
Dimensions7.84 × 5.49 × 3.78 mm
L/W Ratio1.43
Culet sizeLarge
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.84 mm5.49 mm1.66 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG680560448
Side View
Table 62.0%Crown 34.6°Girdle: MediumPavilion 39.3°Culet: LargeDepth 68.9%

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: £1,773 GBP|Low: £165 GBP|High: £1,806 GBP|Avg: £511 GBP|-1.9%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 16
October 31, 2026
Retailer 15£172 GBP
Retailer 4£191 GBP
Retailer 7£199 GBP
Retailer 6£213 GBP
Retailer 16£213 GBP
Retailer 14£297 GBP
Retailer 10£365 GBP
Retailer 2£398 GBP
Retailer 8£405 GBP
Retailer 11£497 GBP
Retailer 5£684 GBP
Retailer 13£686 GBP
Retailer 12£830 GBP
Retailer 9£857 GBP
Retailer 3£866 GBP
Rare Carat£1,773 GBP

44 data points across 16 retailers

18 retailers£172 GBP to £880 GBP

A
Cheapest Retailer
-
£172 GBP
$230 USD
A
Retailer 2
-
£191 GBP
$256 USD
View
Final sale: no returns
A
Retailer 3
-
£199 GBP
$267 USD
View
A
Retailer 4
-
£213 GBP
$285 USD
View
A
Retailer 5
-
£213 GBP
$285 USD
View
B+
Retailer 6
-
£297 GBP
$398 USD
View
A
Retailer 7
-
£365 GBP
ZAR 7,908 ZAR
View
A
Retailer 8
-
£398 GBP
View
A
Retailer 9
-
£405 GBP
$543 USD
View
A
Retailer 10
-
£497 GBP
A$1,024 AUD
View
A
Retailer 11
-
£684 GBP
$916 USD
View
A
Retailer 12
-
£686 GBP
$919 USD
View
A
Retailer 13
-
£723 GBP
$968 USD
View
B+
Retailer 14
-
£830 GBP
View
B+
Retailer 15
-
£857 GBP
View
B+
Retailer 16
-
£866 GBP
$1,160 USD
View
B+
Retailer 17
-
£880 GBP
$1,179 USD
View
Most Expensive
Rare Carat
GD5859_l_680560448 · Oct 18
£1,773 GBP
$2,375 USD
View
Price last confirmed 13 days ago
17 more retailers have this diamond
Prices start from £172 GBPSave up to £708 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
£172 GBP