Three different types of wood are assigned to the chairs, and for the table, there are three spheres with different materials in the file.

TurboSmooth is applied to the objects, recommended value is 2.

Tornado Table - Ø 110 x H. 74 cm
Apex Stool - Ø 38 x H. 44 cm

https://www.riva1920.it/en/products/living-and-dining-furniture/tables/tornado 
https://www.riva1920.it/en/products/living-and-dining-furniture/stools/apex-stool 
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For those working in V-Ray versions lower than 3.1, be careful, the materials in the BRDF section are set to Microfaset GTR (GGX). If your version is older than 3.1, the BRDF field will be empty. Choose Blinn, Phong, or Ward – whichever is preferable for you.

For Corona render, it is recommended to use a version no lower than 1.5, as the glossiness of the materials is set with PBR in mind.