Redstone Ore

 For the advanced Redstone circuitry, see Redstone circuits. Redstone ore is the form that Redstone takes when generated in a map. Redstone is a fictional mineral with magnetic and conductive properties, as it is used in all circuitry and compasses.

Redstone ore drops 4 - 5 piles of Redstone Dust when mined with an Iron Pickaxe or better. Redstone ore forms in veins made up of 1 - 10 blocks. This makes it relatively easy to obtain large amounts of Redstone.

If a player left or right clicks on, or an Entity moves or falls on Redstone ore, the block will emit level 9 light for 30 seconds.

Redstone ore veins form at the bottom 16 layers of the map. Below row 14, it can be found in 1.025% of stone. There are an average of 25 redstone ores per chunk.

Redstone ore can be obtained by the enchantment Silk Touch on a pickaxe. Therefore you can use the redstone ore block to create traps or even decoration.

Smelting
Note that the Redstone Ore block cannot be obtained without the Silk Touch enchantment, and that this smelting is inefficient as destroying an ore block yields 4-5 redstone dust rather than the single one smelting does.

History
The block was added on Alpha version 1.0.1 in Seecret Friday Update 3 on July 3, 2010.

Before 1.9 Prerelease 6, Redstone Ore took far longer to mine compared to other ores (4.5 seconds with iron pickaxe). As of 1.9 Prerelease 6, it now has the same mining time as other ores.

Trivia

 * When added to the game, all Redstone related blocks had no official name. In Alpha 1.0.4, July 9, 2010, the name Redstone was given by Notch after demands from the community.
 * With the Silk Touch enchantment, this ore can be collected as an item. It can be smelted into a single Redstone Dust, but it is much more useful for decoration, especially for its unique glowing trait.
 * The block updates when stepped on, making it useful for traps and secret entrances.
 * Redstone Ore is the logo for the Powered by Redstone blog.
 * Walking on Redstone Ore while sneaking does not cause it to light up.
 * A common mistake for new players is to ignore gold and diamonds to get redstone, thinking they are rubies.