Round|Lab Grown|IGI

20.10ct G VS1 Round Lab Grown Diamond

ID • G/VS1 • IGI LG808608385

Shape and cutting style on the report: Round brilliant

Certificate IGI LG808608385

Diamond specifications and retailer prices

From £8,157 GBP

As of October 30, 2026

Save £22,495 GBP (73%) vs most expensive(unlock to see where)

16 retailers carry this diamond

Most expensive: £30,652 GBP at Brilliant Earth · As of October 29, 2026

View at Brilliant Earth

About this 20.1ct lab-grown round diamond

This 20.1ct lab-grown round sits in the over five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG808608385 or 808608385. Listed at 16 retailers as of October 29, 2026, with prices from £8,157 to £30,652, a £22,495 spread on the same certified stone. Brilliant Earth lists it at £30,652. 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

20.10

Carat

Colour

VS1

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle33.5°

Pavilion angle40.1°

OriginLab Grown

Grading LabIGI

CertificateIGI LG808608385

Dimensions17.65 × 17.60 × 10.45 mm

L/W Ratio1.00

Girdle conditionFaceted

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 LG808608385

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: Oct 30

Current: £30,652 GBP|Low: £8,130 GBP|High: £31,226 GBP|Avg: £14,281 GBP|-1.0%

Brilliant Earth

Retailer 2

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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 15

Retailer 16

October 31, 2026

Retailer 9£8,157 GBP

Retailer 15£8,729 GBP

Retailer 4£9,078 GBP

Retailer 6£9,222 GBP

Retailer 16£9,490 GBP

Retailer 14£9,912 GBP

Retailer 11£9,915 GBP

Retailer 3£10,125 GBP

Retailer 8£10,125 GBP

Retailer 13£10,743 GBP

Retailer 2£11,778 GBP

Retailer 12£19,130 GBP

Retailer 10£19,981 GBP

Retailer 5£20,261 GBP

Retailer 7£29,640 GBP

Brilliant Earth£30,652 GBP

41 data points across 16 retailers

16 retailers£8,157 GBP to £30,652 GBP

B+

Cheapest Retailer

£8,157 GBP

B+

Retailer 2

£8,729 GBP

$11,696 USD

View

B+

Retailer 3

£9,078 GBP

$12,164 USD

View

B+

Retailer 4

£9,222 GBP

$12,357 USD

View

B+

Retailer 5

£9,490 GBP

$12,715 USD

View

B+

Retailer 6

£9,912 GBP

$13,281 USD

View

B+

Retailer 7

£9,915 GBP

$13,285 USD

View

B+

Retailer 8

£10,125 GBP

$13,567 USD

View

Retailer 9

£10,125 GBP

$13,567 USD

View

Price last confirmed 19 days ago

B+

Retailer 10

£10,743 GBP

$14,395 USD

View

B+

Retailer 11

£11,778 GBP

View

Retailer 12

£19,130 GBP

A$39,434 AUD

View

Price last confirmed 9 days ago

Retailer 13

£19,981 GBP

€25,498 EUR

View

Retailer 14

£20,261 GBP

$27,148 USD

View

Retailer 15

£29,640 GBP

$39,715 USD

View

Most Expensive

Brilliant Earth

20289795A · Oct 29

£30,652 GBP

$41,070 USD

View

15 more retailers have this diamond

Prices start from £8,157 GBPSave up to £22,495 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+

20.10ct Round

£8,157 GBP