Changing the transparency of an object. Switching alpha on shader/texture?

So I have this object in my scene that has a stone like material. I want to make it semi transparent. I can in the Standard shader, pick the transparent rendering mode and set the alpha in Albedo color to like 111. It looks great but the problem is:

how can I set this in code? And also all things in a scene that share the same material have the same effect applied to them. Anyway to change this?

 

Ahh I figured out how to do it:

this.GetComponent<MeshRenderer>().material.color = new Color(1.0f, 1.0f, 1.0f, 1.0f);