Emerald|Lab Grown|IGI

20.29ct F VS1 Emerald Lab Grown Diamond

ID • F/VS1 • IGI LG662491134

Shape and cutting style on the report: Emerald cut

Certificate IGI LG662491134

Diamond specifications and retailer prices

From £5,572 GBP

$7,466 USD

As of November 2, 2026

Save £15,997 GBP (74%) vs most expensive(unlock to see where)

16 retailers carry this diamond

Most expensive: £28,704 GBP at Brilliant Earth · As of November 2, 2026

View at Brilliant Earth

About this 20.29ct lab-grown emerald diamond

This 20.29ct 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 LG662491134 or 662491134. Listed at 16 retailers as of October 31, 2026, with a 287% 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

20.29

Carat

Colour

VS1

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle34°

Pavilion angle39.5°

OriginLab Grown

Grading LabIGI

CertificateIGI LG662491134

Dimensions18.45 × 12.92 × 8.54 mm

L/W Ratio1.43

Culet sizeLarge

Cert comments

This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG662491134

Side View

Caratlytics Score

How it works →

B+

Very Good

Strong quality and value balance

Unlock full score analysis

See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2

Current: £28,704 GBP|Low: £5,350 GBP|High: £29,592 GBP|Avg: £10,834 GBP|-3.0%

Brilliant Earth

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

Retailer 12

Retailer 13

Retailer 14

Retailer 15

Retailer 16

Retailer 17

Retailer 18

November 2, 2026

Retailer 16£5,572 GBP

Retailer 13£5,795 GBP

Retailer 3£6,241 GBP

Retailer 8£6,252 GBP

Retailer 5£6,266 GBP

Retailer 4£6,422 GBP

Retailer 7£6,464 GBP

Retailer 15£6,464 GBP

Retailer 17£7,269 GBP

Retailer 14£7,308 GBP

Retailer 6£7,486 GBP

Retailer 2£7,963 GBP

Retailer 12£11,421 GBP

Retailer 11£12,314 GBP

Retailer 18£17,996 GBP

Retailer 9£20,101 GBP

Retailer 10£21,569 GBP

Brilliant Earth£28,704 GBP

27 data points across 18 retailers

16 retailers£5,572 GBP to £21,569 GBP

B+

Cheapest Retailer

£5,572 GBP

$7,466 USD

B+

Retailer 2

£5,795 GBP

$7,765 USD

View

B+

Retailer 3

£6,266 GBP

$8,396 USD

View

B+

Retailer 4

£6,422 GBP

$8,605 USD

View

Retailer 5

£6,464 GBP

$8,661 USD

View

Price last confirmed 22 days ago

B+

Retailer 6

£6,464 GBP

$8,661 USD

View

B+

Retailer 7

£7,269 GBP

$9,740 USD

View

B+

Retailer 8

£7,308 GBP

$9,792 USD

View

Retailer 9

£7,486 GBP

$10,030 USD

View

B+

Retailer 10

£7,963 GBP

View

Retailer 11

£11,421 GBP

€14,574 EUR

View

Retailer 12

£12,314 GBP

A$25,383 AUD

View

Retailer 13

£17,996 GBP

$24,113 USD

View

Price last confirmed 22 days ago

Retailer 14

£20,101 GBP

$26,933 USD

View

Retailer 15

£21,569 GBP

$28,901 USD

View

Most Expensive

Brilliant Earth

13579074A · Nov 2

£28,704 GBP

$38,460 USD

View

Price under review

15 more retailers have this diamond

Prices start from £5,572 GBPSave up to £15,997 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.

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B+

20.29ct Emerald

£5,572 GBP