Glowstone Dust



Glowstone Dust can only be obtained by destroying glowstone blocks found in The Nether. Each glowstone block yields four glowstone dust, wich can be used to craft one glowstone block. Glowstone dust currently has no other uses. It will presumably be required to craft lanterns when they will be added.

A video of glowstone properties can be seen here

Crafting
Note: The crafting recipe changed in version 1.6.6