What CAN'T glass accomplish ...

Two of the earliest explanations of the optical spectrum came from Isaac Newton, when he wrote his Opticks, and from Goethe, in his Theory of Colours, although earlier observations had been made by Roger Bacon who first recognized the visible spectrum in a glass of water, four centuries before Newton discovered that prisms could disassemble and reassemble white light.

(Source - Wikipedia)

Maybe not the work of a simple glass, but my living room door (which is made of glass) sure puts on a light show from time to time.