Thick Conductive Glass Answered

I have a desk with a glass surface and have this inspiration to mount the tablets that I use as additional monitors under the glass. I need to replace it with something that will allow the touch inputs through it. Ill settle for any solid transparent material but I need it too have a decent thickness that I can maintain roughly the same strength of the glass material as part of the pretense is I would like to be able to still set things on top of the desk and use it as a workspace.