World of Warcraft mineral processing is a professional skill in jewelry processing, which can screen precious gems from ores. Five pieces of ore are needed for one beneficiation, and they will be destroyed when used up. After selecting the ore, by-products may appear, depending on the grade of the ore.

Press the K key, and a skill book will appear, from which you can find the business skills of jewelry processing (provided that you learn them first), with a red icon in it.

Click the icon and put it on the ore icon in the backpack, and you can beneficiate. One beneficiation requires five pieces of the same ore, some of which will have slag.