CaratHunter
Plans
Radiant|Lab Grown|IGI

20.30ct G VS1 Radiant Lab Grown Diamond

ID • G/VS1 • IGI LG813655566

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG813655566

Diamond specifications and retailer prices

From £12,073 GBP
As of November 1, 2026
Save £16,113 GBP (57%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £36,662 GBP at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 20.3ct lab-grown radiant diamond

This 20.3ct lab-grown radiant 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 LG813655566 or 813655566. Listed at 16 retailers as of November 1, 2026, with a 133% 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

20.30
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle31.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG813655566
Dimensions18.72 × 13.05 × 8.90 mm
L/W Ratio1.43
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
18.72 mm13.05 mm20.30 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG813655566
Side View
Table 67.0%Crown 34.9°Girdle: Slightly ThickPavilion 31.9°Culet: NoneDepth 68.2%

Caratlytics Score

How it works →
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 1
Current: £13,269 GBP|Low: £6,593 GBP|High: £36,662 GBP|Avg: £16,431 GBP|+3.5%
Retailer 1
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
Taylor and Hart
November 1, 2026
Retailer 7£9,937 GBP
Retailer 10£12,073 GBP
Retailer 3£12,958 GBP
Retailer 2£13,199 GBP
Retailer 1£13,269 GBP
Retailer 11£14,087 GBP
Retailer 13£14,133 GBP
Retailer 9£14,865 GBP
Retailer 15£15,024 GBP
Retailer 5£15,031 GBP
Retailer 6£16,405 GBP
Retailer 4£20,561 GBP
Retailer 14£20,896 GBP
Retailer 12£24,653 GBP
Retailer 8£28,185 GBP
Taylor and Hart£36,662 GBP

15 data points across 16 retailers

16 retailers£12,073 GBP to £28,185 GBP

Retailer 1
-
£9,937 GBP
$13,335 USD
Price last confirmed 12 days ago
B
Retailer 2
-
£12,073 GBP
View
B
Retailer 3
-
£12,958 GBP
$17,389 USD
View
B
Retailer 4
-
£13,199 GBP
$17,712 USD
View
B
Retailer 5
-
£13,269 GBP
$17,806 USD
View
B
Retailer 6
-
£14,087 GBP
$18,904 USD
View
B
Retailer 7
-
£14,133 GBP
$18,965 USD
View
B
Retailer 8
-
£14,865 GBP
$19,948 USD
View
B
Retailer 9
-
£15,024 GBP
$20,161 USD
View
B
Retailer 10
-
£15,031 GBP
$20,171 USD
View
Retailer 11
-
£16,405 GBP
View
Price last confirmed 9 days ago
B
Retailer 12
-
£20,561 GBP
$27,591 USD
View
Final sale: no returns
B
Retailer 13
-
£20,896 GBP
$28,041 USD
View
B
Retailer 14
-
£24,653 GBP
€31,508 EUR
View
B
Retailer 15
-
£28,185 GBP
A$58,189 AUD
View
Most Expensive
Taylor and Hart
YFN343Y · Oct 31
£36,662 GBP
$49,198 USD
View
Price under review
15 more retailers have this diamond
Prices start from £12,073 GBPSave up to £16,113 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
20.30ct Radiant
£12,073 GBP