Mining is one of the five professions and one of the two core professions of MapleStory, the other being Herbalism. Mining is a prerequisite to learn two other professions: Smithing and Accessory Crafting. Cole teaches the Mining profession and runs secret harvesting farms along with Saffron in Ardentmill, which can be used to harvest ores and herbs.
Miners have the ability to harvest Veins to obtain Ores, either without a tool or with a special pickaxe or wrench. They can then smelt these ores to obtain plates and gems, which can be used for Smithing and Accessory Crafting.