Glowstone Dust

Glowstone Dust is obtained by mining glowstone blocks (only found in the Nether). Glowstone dust no longer requires a pickaxe to obtain.

Uses
When mined properly, each glowstone block yields 2 to 4 glowstone dust that can be reconstituted into a block. A glowstone block, like a jack-o-lantern, is a portable light source brighter than a torch. Glowstone dust can also be used to increase potion effects and it is required to craft the Redstone Lamp. Unlike Redstone dust, Glowstone dust cannot be placed.

Glowstone dust can be used in potions to increase the strength of its effect; however, it will reduce a potion's effect time.

As a Brewing ingredient
Glowstone upgrades the potion

History
Glowstone dust was introduced in Alpha as part of the Nether environment in the Halloween 2010 update. In Beta 1.6.6, the crafting recipe for glowstone blocks was changed from 9 units of glowstone dust to 4.

Trivia

 * In the code, Glowstone Dust is referenced as "lightStoneDust" (formerly "yellowdust")
 * The icon for Glowstone Dust is a recolored version of the Redstone Dust icon.
 * Glowstone dust can sometimes be obtained by digging dirt or sand. It was obtained in multiplayer with an iron shovel, both above ground and below.

Leuchtsteinstaub Glowstone (poudre) Izzókőpor 발광석 가루 Lichtsteen (stof) Glowstone (pył) Светопыль 萤石粉