Mithril

 is a resource in the Mining Collection that can be obtained in the Dwarven Mines by mining Mithril veins, using a pickaxe with Breaking Power 4 or higher.

Collection
Collecting mithril increases the player's mithril collection and can grant useful items or perks upon collecting a specific amount of mithril. Mithril collection contains many good recipes, including Dwarven Super Compactor and Beacons.

Obtaining
Mithril can be mined from Mithril Veins, where the inside is harder to break and gives more Mithril, but the outside breaks quicker and gives 1 Mithril. From the easiest to hardest to mine, these veins are made of Cyan Hardened Clay, Gray Wool, Dark Prismarine, Prismarine Brick, Prismarine, and Light Blue Wool. All ores in the vein give 45 mining XP. However, there are some veins which are not purely Mithril and give only 20 mining XP.

Mithril Vein

The amount of Mithril players receive from mining ores is as follows: NOTE: these multipliers apply multiplicatively with Mining Fortune.

Usage
Mithril is used to upgrade Mithril Minions, craft Enchanted Mithril, and create Refined Mithril in The Forge.

Mithril sells for a relatively high amount of money at the Bazaar and therefore is a good money making method for early game players.

Trivia

 * Mithril is a material from J.R.R Tolkien's Middle Earth universe. Dwarves forged it into armor that cannot be pierced by even the strongest blades. This is referenced not only shown by the name of the ore but also by the Mithril Coat, a direct reference to Tolkien's Middle Earth Mithril.
 * Mithril is also an ore in Terraria.