Gelpick

The Gelpick is a Pre-Hardmode pickaxe capable of mining and. Sharing the same pickaxe power with the Molten Pickaxe and the Reaver Shark, it is the fastest pickaxe available before Hardmode.

Trivia

 * It is the only pure pickaxe tool with the word "pick" in its name that doesn't also have the word "axe" in its name.