Redstone

Redstone is usually found at bedrock level and diamond level.  Redstone circuts are useful for lighting redstone lights.  Redstone lights can be used to light caverns, houses, and pathways.  Redstone can also blow up dirt, ores, stone, and houses by putting a block of tnt touching the redstone, and leaving a trail of redstone. Next light it with a redstone torch and watch it blow up!