Block of Gold

Block of Gold is a block that is used mainly for decoration or to store Gold Ingots.

Nether Reactor
Four Blocks of Gold, along with fourteen pieces of Cobblestone and the Nether Reactor Core, are used to make the Nether Reactor. Unfortunately the Nether Reactor Core was removed in 0.12.1.

Crafting

 * 9 Gold Ingots => 1 Block of Gold
 * 1 Block of Gold => 9 Gold Ingots
 * 8 Blocks of Gold + 1 Apple => 1 Enchanted Golden Apple.

Trivia

 * Blocks of Gold must be mined by either an Iron Pickaxe or a Diamond Pickaxe.
 * Gold Blocks are now easier to craft due to infinite worlds and caves. However, in pre 0.9 worlds, it was much more difficult to craft.
 * Blocks of Gold were the only Mineral Blocks with an actual use other than decoration until Update 0.12.1, when the actual Nether was added.