http://www.potsaa.com/glass-green/

Why the banks of green glass?
I wondered why the edges of green glass You know when you hold the sheet in your hands and watch it from a side view. so that you are looking for donation sides do not cross.
Good question, I do not know the answer, but if I had to make a supposition, I would say that most glass is made from quartz and most quartz has a slight green tint to it. Thus, while a thin coat color does not look a side view (thicker) does not look green.
Tony Allen 2 Gerald Green of the glass SICK alle-oop!!!