I'm still new to the game but I thought I might add what I've learned. Below will be a list of ore locations as I find them.
Golden Field directly outside of the Chroland Capital where the Lvl 21 Mammoths are is a good deposit. Several locations of the ore in a cluster. You can't miss it.
There is also a bag here that spawns approximately every 15 minutes which you can get runes from.
There are two spawns of a boss mammoth which drops items you can use around its' level.
- The Buy price on the order sheet of mithril fluxuates as everything. So far it ranges from 3s-5s which can make you some good money depending on the time you put in.
-102,2590 is two spots for agate, right next to the Lvl 19 Mantis and Lvl 20 Tangela. Also has a blank pant for crystal growing right by them.
In game name is speeces, on server 31 Concealed Forest. Ask me anything and I'll try to help.