It should be mentioned that Glass has some kind of effect(s) on mob AI. Many mob drowners that people make exploit this and wouldn't work otherwise. It seems that when a mob is submerged underwater and has a glass wall next to it, it will not constantly try to move up in the water and reach the surface like mob normally always do: instead, it just sits there... until it dies. This looks like a bug, which means it will be removed at some point (causing people to redesign their mob drowners or switch into other mob-killer mechanisms). ---Esfect
It doesn't gather faster, but you should have mentioned it break pretty fast, even by hand. --FuzzyWuff 23:34, 28 March 2010 (UTC)
Sword help break glass faster, but we don't have a sword thumbnail. PurpleKiwi 23:52, 9 October 2010 (UTC)
Breaking Glass
"When broken, glass is lost forever and you do not receive a block of glass or sand to rebuild with." It does so in Survival, however, though I know it is not intended to be found in this mode legitimately. SteveZombie 21:00, 4 April 2010 (UTC)
Image
We could do with a better image. --Zaneo 19:59, 15 July 2010 (UTC)
Coal/Glass ratio
Just did some burning... exactly 8 pieces of coal were used to make 64 glass.
Suffocation
Glass shares some properties of an air block, if a player is forced into a glass block by either a minecart or boat they will pass through the block and not suffocate.
OpGlass
Is it a mod? Please answer this, I am very confused. Here's a quote mentioning OpGlass:
@FalzarGregar; Ah, good point. The glass will be made of OpGlass, a special block that only Operators and up can destroy. Also, this would all be made of Adminium, and would be zoned. All in all, it would be effectively secured.