Orichalcum Ore

What is the most efficient way to farm Orichalcum Ore?

http://ffxiclopedia.wikia.com/wiki/Orichalcum_Ore

Looks like maybe mining but idk to much about that><

I've been down this road before. My conclusion was it's not worth the time it takes to farm myself. If I look at how much gil it costs to buy stacks vs farm stacks I have to think about how much gil I could make in the time it takes to farm. Most of the time I can make way more gil in that time than it costs to buy them.

The only exception is if the market is dry... then you really don't have much of a choice.

Mining in Halvung is pretty easy. I used to do it all the time in the 75 days. Use your fastest moving job and you'll learn where all the Mining Points are really quick.

If its for levelling, i would try to find any alternative. Those sucked then and they still suck.

I've never had a shortage to farm oricalchum ores, i always mine #3 in my mog garden grove, it seems to give more then #1 or #2 (maybe i'm imagining things though). atm its intresting to do VW too for ores with the campaign being active.
I do craft those ingots slowly though, short bursts of one lvl every two weeks.