Netherrack

Netherrack is a collection item found primarily on the Crimson Isle. It gives  experience when mined.

Mining
Netherrack can be mined primarily on the Crimson Isle.

Bazaar
 can be bought from the Bazaar for.

Collection
Collecting netherracks increases the player's netherrack collection, which grants useful items and perks upon collecting certain amounts of netherracks.

Smelting Ingredient
 can be smelted in a furnace into.

Sidequest
requires 1,000,000 in Collection. 163,840 blocks of it (1,024x ) will be consumed upon claiming the boots.

Trivia

 * Smelting Touch Pickaxes / Drills will automatically smelt the netherrack into . This will not count towards the collection, so the player must use a tool without smelting touch.
 * Netherrack used to be one of the hardest collections to maintain at #1. Although current #1 on leaderboard  has almost double the amount of #2.
 * Netherrack is one of the only collections that does not have a Minion, the others being Lily Pad, Gemstone, Magmafish, Sulphur and Ink Sac.
 * Since there is no minion for, the most efficient way to collect is to equip as well as wear  and other Mineral Armor pieces.
 * Prior to the Nether update's release, players were able to access the Blazing Fortress as early as Combat Level V. Notably, those on the Ironman gamemode could quickly reach netherrack collection V and unlock the recipe for the Magical Lava Bucket.