Ghast Tear

Ghast tears are dropped by Ghasts when they are killed.

Use
There is no use as of yet, but will be used to make potions in the future (Maybe Beta 1.10)

Future
Ghast tears will be a potion ingredient in Minecraft Beta 1.9. The brewing functionality already exists in Minecraft Beta 1.9 pre-release 2.

Trivia

 * It is likely that Ghasts drop these due to the "crying noises" they make and that they appear to be sobbing.