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Emerald|Lab Grown|IGI

21.05ct F VS1 Emerald Lab Grown Diamond

ID • F/VS1 • IGI LG781605153

Shape and cutting style on the report: Emerald cut

Certificate IGI LG781605153

Diamond specifications and retailer prices

From £10,240 GBP
$13,720 USD
As of November 2, 2026
Save £8,484 GBP (45%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £86,406 GBP at Diamonds Direct · As of November 1, 2026
View at Diamonds Direct

About this 21.05ct lab-grown emerald diamond

This 21.05ct 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 LG781605153 or 781605153. Listed at 15 retailers as of November 2, 2026, with a 83% 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

21.05
Carat
F
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG781605153
Dimensions18.53 × 13.17 × 8.49 mm
L/W Ratio1.41
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
18.53 mm13.17 mm21.05 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG781605153
Side View
Table 67.0%Crown 33.6°Girdle: Slightly ThickPavilion 40.3°Culet: LargeDepth 64.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £86,406 GBP|Low: £8,090 GBP|High: £86,406 GBP|Avg: £21,385 GBP|+22.2%
Diamonds Direct
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 2, 2026
Retailer 8£8,090 GBP
Retailer 9£10,240 GBP
Retailer 3£10,485 GBP
Retailer 4£10,627 GBP
Retailer 5£11,467 GBP
Retailer 7£11,878 GBP
Retailer 10£11,878 GBP
Retailer 13£11,878 GBP
Retailer 11£12,287 GBP
Retailer 2£14,841 GBP
Retailer 6£32,376 GBP
Retailer 12£33,227 GBP
Diamonds Direct£86,406 GBP

43 data points across 13 retailers

15 retailers£10,240 GBP to £18,723 GBP

Retailer 1
-
£8,090 GBP
$10,840 USD
Price last confirmed 14 days ago
B
Retailer 2
-
£10,240 GBP
$13,720 USD
View
B
Retailer 3
-
£10,485 GBP
$14,049 USD
View
B
Retailer 4
-
£10,627 GBP
$14,239 USD
View
B
Retailer 5
-
£11,467 GBP
$15,365 USD
View
Final sale: no returns
B
Retailer 6
-
£11,878 GBP
$15,915 USD
View
B
Retailer 7
-
£11,878 GBP
$15,915 USD
View
Retailer 8
-
£11,878 GBP
$15,915 USD
View
Price last confirmed 20 days ago
B
Retailer 9
-
£12,287 GBP
$16,463 USD
View
B
Retailer 10
-
£14,841 GBP
View
B
Retailer 11
-
£18,723 GBP
$25,087 USD
View
Retailer 12
-
£32,376 GBP
$43,380 USD
View
Price under review
Retailer 13
-
£33,227 GBP
$44,520 USD
View
Price under review
Most Expensive
Diamonds Direct
819522 · Nov 1
£86,406 GBP
$115,775 USD
View
Price under review
13 more retailers have this diamond
Prices start from £10,240 GBPSave up to £8,484 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.

B
21.05ct Emerald
£10,240 GBP