A Good Recipe for Glass Surprise
Take silica, fuse with boric oxide
by heating to molten ball stage.
Form as desired. Let cool till
hard, brittle, transparent or translucent, but
do not allow crystals to form.
The surprise is that glass is
considered to be a supercooled liquid
and not a true solid -despite
what our senses may tell us!
Huh. Who knew, right? Super cool!
breaking glass gif found at http://giphy.com