Malachite is a raw gem that miners can extract from Copper Veins. However, the chances of actually getting it by mining copper are approximately 1%.
Other potential sources include mob drops, [Prospecting] on [Copper Ore], and chests.
As an Ingredient
Malachite is used in the following recipes:
Blacksmithing
Engineering
Jewelcrafting
Patch changes
- Patch 6.0.2 (2014-10-14): Stacks to 200, up from 20.