Malachite

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

 * Copper Battle Axe
 * Copper Chain Vest
 * Gemmed Copper Gauntlets

Engineering

 * Crude Scope
 * Deepdive Helmet
 * Gnomish Universal Remote
 * Mechanical Squirrel Box

Jewelcrafting

 * Bronze Band of Force
 * Inlaid Malachite Ring
 * Malachite Pendant