Obsidium Ore is a new mineral that is being introduced to mining in the Cataclysm Expansion. Before its release as a common ore in this expansion, it was a key downfall after killing mobs in old world areas like the Ruins of Ahn’Qiraj.
When Anubisath mobs were killed in Ahn’Qiraj, a large or small piece of obsidian could fall to the ground and was in poor condition with 305 mining. The piece would yield obsidian shards, gems, or scarabs. A player was required to have a mining enchantment +5 and a maximum mining at skill level 300 in order to mine it.
Cataclysm is now being reintroduced into World of Warcraft as a common ore. When mining deposits of obsidium, a player can find it accompanied by volatile fire and shadow.
Obsidium deposits will appear in the starting areas of Cataclysm closer to 80 because it is the same type of mineral that Cobalt was for Wrath of the Lich King, which means that it is the first mineral you will come across upon entering Cataclysm.
The best and only recommended place to grow obsidium deposits is Mount Hyjal because it can be accessed by plane and there are no previous missions to reach this area. The other option is Vashj’ir, which is an underwater zone that was added in Cataclysm. Most players do not prefer to mine underwater and that is why Mount Hyjal is currently the best area to farm it.
Please note that while you are conducting quests through Mount Hyjal, the zone will change in some areas, this shouldn’t have a major impact on the mining routes on Mount Hyjal, but this expansion’s new tiered content idea is in full effect. .