Glowstone dust is a crafting material found in the game Minecraft. It is obtained by breaking Glowstone blocks, which are typically located in the Nether dimension. When mined, each block drops 2 to 4 pieces of glowstone dust. This dust can be used to create Glowstone blocks or to enhance the brightness of potions when brewing. Additionally, it can be combined with other materials to craft various items, making it a versatile resource for players exploring the game.