Choosing random material from an array

So basically I am trying to choose a random material from an array of materials and for now just display which one is picked in the console. I know how to do this with gameObjects but not sure the right words to use when referencing materials rather than objects. I attached what I came up with. Thank you!
'using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class gameManager : MonoBehaviour {

public Material[] Mats;
GameObject currentMat;
int index;

// Use this for initialization
void Start ()
    Mats = Material.FindObjectsOfType(Material);
    index = Random.Range(0, Mats.Length);
    currentMat = Mats[index];

// Update is called once per frame
void Update () {


In start you could add this to start to print out some material info:

Debug.Log("Chosen material is " + Mats[index].name + "with color " + Mats[index].color + ".");

You could then assign this chosen material to the material or shared material of a meshRenderer.

currentMat cannot be of type GameObject if you want to assign it a value from Mats.

I’m not sure you can use FindObjectsOfType with Materials. You may have to find Renderers and get their materials.