CaratHunter
Plans
Emerald|Lab Grown|IGI

20.09ct F VS1 Emerald Lab Grown Diamond

VG • F/VS1 • IGI LG849648389

Shape and cutting style on the report: Emerald cut

Certificate IGI LG849648389

Diamond specifications and retailer prices

From £3,947 GBP
$5,296 USD
As of October 31, 2026
Save £15,063 GBP (79%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £28,377 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 20.09ct lab-grown emerald diamond

This 20.09ct lab-grown emerald sits in the over five carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG849648389 or 849648389. Listed at 13 retailers as of October 31, 2026, with a 382% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

20.09
Carat
F
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.8°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG849648389
Dimensions18.03 × 12.56 × 8.89 mm
L/W Ratio1.44
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
18.03 mm12.56 mm20.09 ctF / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG849648389
Side View
Table 64.0%Crown 36.8°Girdle: Slightly ThickPavilion 41.3°Culet: LargeDepth 70.8%

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: Oct 31
Current: £19,009 GBP|Low: £3,947 GBP|High: £19,084 GBP|Avg: £7,690 GBP|-0.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 3£3,947 GBP
Retailer 6£3,979 GBP
Retailer 12£4,122 GBP
Retailer 10£4,385 GBP
Retailer 4£4,495 GBP
Retailer 2£5,186 GBP
Retailer 5£5,248 GBP
Retailer 7£6,374 GBP
Retailer 8£7,814 GBP
Retailer 9£11,458 GBP
Retailer 11£14,764 GBP
Retailer 1£19,009 GBP

4 data points across 12 retailers

13 retailers£3,947 GBP to £19,009 GBP

A
Cheapest Retailer
-
£3,947 GBP
$5,296 USD
A
Retailer 2
-
£3,979 GBP
$5,340 USD
View
Final sale: no returns
B+
Retailer 3
-
£4,122 GBP
$5,531 USD
View
B+
Retailer 4
-
£4,385 GBP
$5,885 USD
View
B+
Retailer 5
-
£4,495 GBP
$6,032 USD
View
B+
Retailer 6
-
£5,186 GBP
$6,959 USD
View
B+
Retailer 7
-
£5,248 GBP
View
B
Retailer 8
-
£6,374 GBP
$8,553 USD
View
B
Retailer 9
-
£7,814 GBP
A$16,133 AUD
View
B
Retailer 10
-
£11,458 GBP
$15,376 USD
View
B
Retailer 11
-
£14,764 GBP
$19,813 USD
View
B
Retailer 12
-
£19,009 GBP
$25,509 USD
View
Most Expensive
Brilliant Earth
22388316A · Oct 31
£28,377 GBP
$38,080 USD
View
Price under review
12 more retailers have this diamond
Prices start from £3,947 GBPSave up to £15,063 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
20.09ct Emerald
£3,947 GBP