WOW Gold Mining provides raw materials for

So it's very important that prospective gold makers gather and hoard as many of these raw materials as possible in anticipation of this demand.

The reason that items gathered from both of these professions are so valuable is that they serve as raw materials used in secondary crafting professions. To get an idea of how powerful this relationship is, here's a list of the primary professions followed secondary professions that rely on them:

Mining provides raw materials for: Blacksmithing,Sell Gold WOW, Engineering, Jewelcrafting.Herbalism provides raw materials for: Alchemy, Inscription