[xzins]

Glass can be thick cut and as difficult to break as stone.

Spilling seems to be a more serious concern than does breakage. The chalice would break if it were dropped. But that wouldn't matter given that spillage would occur.

Metal, if dropped, will also spill.

[wideawake]

Glass can be thick cut and as difficult to break as stone.

This is true: but such a chalice is probably significantly heavier and it must be elevated at least twice. And heavy glass isn't any more precious for being heavy.

Spilling seems to be a more serious concern than does breakage.

Which is why, after the consecration, the chalice should be moved as little as possible and handled by as few people as possible. Of course, the modern fad for utraquism presents problems on that front.

[NYer]

Spilling seems to be a more serious concern than does breakage. The chalice would break if it were dropped. But that wouldn't matter given that spillage would occur. Metal, if dropped, will also spill.

You make an excellent point!! Thanks for posting it.