V-Ray versions are 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 - whichever suits you best"

For Corona render, it is recommended to install a version of at least 1.5, since the glossiness of materials is configured with PBR in mind.

link:
https://www.litfad.com/it/contemporary-8-light-shade-chandelier-for-residential-use-with-suspension-rod-direct-wired-electric-and-adjustable-hanging-rod-220v-240v-s-8375673.html