Ondulation is a Lecce stone table. The stone takes the form of a series of swinging tower-like structures made entirely of stone using a spinning technique that will be used for everyday life in open spaces. And also as indoor furniture.

Manufacturer website: https://www.pimarlimestone.com/ 

Who works in V-Ray version lower than 3.1, be careful, in the materials in the BRDF section there is Microfaset GTR (GGX), if your version is older than 3.1, then the BRDF field will be empty. Choose Blinn, Phong or Ward - which is preferable for you