https://bower-studios.com/collections/new-releases-mirrors/oval-moongate-mirror/ 

Oval Moongate Mirror

Color: clear, bronze, copper
Size: 42" x 78" x 1-1/4"

Number of polygons: 16000

The scene contains three models at the origin in different colors. The modifier stack is collapsed except for TurboSmooth (1 iteration). Unwrapping is done. Logical naming of materials. Paths to textures are removed. The export file format is *obj, and a material library file *mat is also added.

Corona version 9
CoronaLegacyMtl Materials
In CoronaRender 6 and below CoronaLegacyMtl=CoronaMtl
For Corona render, it is recommended to install version not lower than 1.5, since the glossiness of materials is configured taking into account PBR.

Vray version 5
VRayMtl Materials
Those who work 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. Select Blinn, Phong or Ward - what is preferable for you.