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Emerald|Lab Grown|IGI

20.05ct F VS1 Emerald Lab Grown Diamond

ID • F/VS1 • IGI LG843679626

Shape and cutting style on the report: Emerald cut

Certificate IGI LG843679626

Diamond specifications and retailer prices

From £3,546 GBP
$4,759 USD
As of November 2, 2026
Save £15,390 GBP (81%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £28,317 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 20.05ct lab-grown emerald diamond

This 20.05ct lab-grown emerald sits in the over five carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG843679626 or 843679626. Listed at 11 retailers as of November 2, 2026, with a 434% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

20.05
Carat
F
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.9°
Pavilion angle42.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG843679626
Dimensions18.67 × 12.61 × 8.03 mm
L/W Ratio1.48
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
18.67 mm12.61 mm20.05 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG843679626
Side View
Table 69.0%Crown 37.9°Girdle: ThickPavilion 42.4°Culet: LargeDepth 63.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £18,936 GBP|Low: £3,546 GBP|High: £19,183 GBP|Avg: £10,246 GBP|-1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 3£3,546 GBP
Retailer 4£3,972 GBP
Retailer 2£5,237 GBP
Retailer 5£6,360 GBP
Retailer 6£7,799 GBP
Retailer 9£7,979 GBP
Retailer 7£11,436 GBP
Retailer 8£14,735 GBP
Retailer 1£18,936 GBP

11 data points across 9 retailers

11 retailers£3,546 GBP to £18,936 GBP

A
Cheapest Retailer
-
£3,546 GBP
$4,759 USD
A
Retailer 2
-
£3,972 GBP
$5,330 USD
View
Final sale: no returns
B+
Retailer 3
-
£5,237 GBP
View
B+
Retailer 4
-
£5,847 GBP
$7,846 USD
View
B+
Retailer 5
-
£6,360 GBP
$8,535 USD
View
B
Retailer 6
-
£7,799 GBP
A$16,101 AUD
View
B+
Retailer 7
-
£7,979 GBP
€10,198 EUR
View
B
Retailer 8
-
£11,436 GBP
$15,346 USD
View
B
Retailer 9
-
£14,735 GBP
$19,773 USD
View
B
Retailer 10
-
£18,936 GBP
$25,411 USD
View
Most Expensive
Brilliant Earth
22286334A · Oct 31
£28,317 GBP
$38,000 USD
View
Price under review
10 more retailers have this diamond
Prices start from £3,546 GBPSave up to £15,390 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
20.05ct Emerald
£3,546 GBP