Hours later,Aylmer returned carrying a crystal glass with a colorless liquid.

VOA: special.2009.09.26

This is because glass has the hardness of crystal materials while also having a disordered arrangement of molecules like a liquid.

VOA: special.2009.09.16

Beads made of glass,of wood, of clay and of crystal.

VOA: special.2009.05.18

I tried simple glass, crystal and even precious stones.

VOA: special.2011.06.18

Soon the sun's warmth makes them shed crystal shells Shattering and avalanching on the snow-crust-- Such heaps of broken glass to sweep away You'd think the inner dome of heaven had fallen.

VOA: special.2010.09.17