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 $16,249 USD
£12,795 GBP
As of October 30, 2026
Save $16,834 USD (51%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $49,198 USD at Taylor and Hart · As of October 30, 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 October 30, 2026, with a 104% 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
Color
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

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 30
Current: $33,083 USD|Low: $8,847 USD|High: $49,198 USD|Avg: $21,906 USD
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
October 31, 2026
Retailer 7$13,335 USD
Retailer 13$16,249 USD
Retailer 5$17,208 USD
Retailer 12$17,389 USD
Retailer 11$17,712 USD
Retailer 2$18,282 USD
Retailer 8$18,965 USD
Retailer 6$19,281 USD
Retailer 10$20,161 USD
Retailer 15$20,171 USD
Retailer 3$22,014 USD
Retailer 14$27,591 USD
Retailer 9$28,041 USD
Retailer 1$33,083 USD
Retailer 4$36,629 USD
Taylor and Hart$49,198 USD

14 data points across 16 retailers

16 retailers$16,249 USD to $33,083 USD

Retailer 1
-
$13,335 USD
Price last confirmed 10 days ago
B
Retailer 2
-
$16,249 USD
£12,795 GBP
View
Retailer 3
-
$17,208 USD
View
Price last confirmed 7 days ago
B
Retailer 4
-
$17,389 USD
View
B
Retailer 5
-
$17,712 USD
View
B
Retailer 6
-
$18,282 USD
View
B
Retailer 7
-
$18,965 USD
View
Retailer 8
-
$19,281 USD
View
Price last confirmed 8 days ago
B
Retailer 9
-
$20,161 USD
View
B
Retailer 10
-
$20,171 USD
View
Retailer 11
-
$22,014 USD
£17,334 GBP
View
Price last confirmed 7 days ago
B
Retailer 12
-
$27,591 USD
View
Final sale: no returns
B
Retailer 13
-
$28,041 USD
View
B
Retailer 14
-
$33,083 USD
€31,508 EUR
View
Retailer 15
-
$36,629 USD
A$56,352 AUD
View
Price last confirmed 9 days ago
Most Expensive
Taylor and Hart
YFN343Y · Oct 30
$49,198 USD
View
Price under review
15 more retailers have this diamond
Prices start from $16,249 USDSave up to $16,834 USD

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
$16,249 USD