Mythril Ore

Mithril Ore is a type of ore shown in a teaser image that will be introduced in the 1.1 update. It will likely be used to craft the Mithril Armor.

It is colored a grayish green and seems to be found in the Cavern layer.

Trivia

 * Mithril Ore may be a reference to the Mithril in J. R. R. Tolkien's writings.