How to make game object mesh impenetrable?

Hi everyone, I’m working on an AR app in which sould be a tool that can make the user able to manipulate and visualize proteins. At the moment I’m struggling on trying to make the protein impenetrable to other objects in the scene: the protein is a FBX file, with multiple vertex as you can imagine.
What should I focus on? The mesh of the object or the collider? Should I add some physics parameters?
Thanks in advance.

You could attach a RigidBody componenet to the object. This makes Unity simulate physics, and so the object shouldn’t be able to penetrate other objects.