The entity reference field stores a reference to the actual node so you do not filter on the string glass you filter on the node id.
If my understanding is correct when you view the glass node you want to show a list of all nodes that reference the glass node.
- Create a view showing content of the type you want to display, also create a block with that view.
- Add a contextual filter on the field that is used to reference the material.
- For "When the filter value is not available" check "provide default value" and then "type" should be "Content ID from URL"
- Go to admin/structure/blocks and place the block where ever you need to display it.