#1 - Sept. 5, 2012, 7:46 p.m.
Nodes I mined for Orichalcum in Orr and Frostgorge on Aug 31 have yet to respawn. I’m assuming they’re not set to a week long cool down as they’re still sold on the trading post.
Orichalcum Nodes
#4 - Sept. 6, 2012, 1:15 p.m.
Orichalcum and Ancient wood nodes are intentionally very rare. They have a longer respawn timer than regular nodes (hours not days). Also, remember, nodes are not always static. Most should change positions and Orichalcum and Ancient wood spawns have a large number of locations they could respawn at within the map.