Natural Stone Wall Lamp IWP Aliexpress
Dimensions 30x30x4.5cm 23x23x4.5cm
https://alii.pub/7066zo 
For close angles it is possible to use Turbosmooth
Materials CoronaPhysicalMTL CoronaLegacyMTLCoronaMTL Vray
Corona 11 version
In versions of CoronaRender 6 and below
CoronaLegacyMtl requires a version of Corona Renderer at least 1.5 since the cards are designed to use PBR (roughness-metallic)
Version Vray 5
Vray materials obtained using Vray-converter
Those who work in a 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 – whichever is preferable for you.
All cards are designed for the PBR roughness-metallic workspace.
Textures and materials have logical names
Texturing UnwrapUVW