minty - what if i go on and on about how one makes glass, the chemicals required, the difficulties in making novel glass compositions, about the glass dissolving the vessel in which it was heated escaping into the furnace and leaving a beautiful puddle of black glass in it wake! or the hours spent prefecting complex chemical composition to substitute hazard chemicals which combust at 1500 C, the temp we make glass at. Oh i could go on for hours! in fact my thesis is over 250 pages long!
Better still i can describe what a glass is and how they differ from other materials let me begin.....