The Pickaxe of the Core is an enchantable high-tier tool added by the Thaumcraft Mod. It has a unique function of being able to 'prospect' a block for its Aspect content. It also has the ability to find Native Chunks from ores.
The reasearch required: Metallum, Instrumentum, Ignis, and Visum.
The Pickaxe of the Core can be repaired with an Anvil at the cost of 1 Thaumium Ingot per 25% reparation. Some levels will also be used in the process. See this page for some more information on item reparation.
Native Ore Clusters can be obtained by mining blocks that have been placed by the Player. This makes it possible to receive 2 Ingots from every ore that is mined without the use of any further Mods.