Textures over a model

Hi everyone,

I would like apply a texture over a 3D model imported in Vuforia Studio.

I've my model imported and it looks on gray color.

I would like apply a high resolution texture over the model to seem a real object.

For example, like this:

https://free3d.com/3d-model/mercury-photorealistic-1k-260439.html

Sphere model + texture

Thanks!