Ok The Elemental ores are all obtainable through 3 ways. FIRST: is BCNM 60. Simply put, win the battle and you may get one.
The next 2 are much better methods for the poor player, however.
SECOND: CHOCOBO DIGGING
You have to get your chocobo digging skil;l up to a considferable level to do this (yes chocobo digging is like a guild with 10 skill lvls)
visit www.cannotlinkto/ffxi and click the chocobo digging section. It lists what can be dug there.
LAST and BEST BY FAR is <b> GARDENING </b>
the recipie is as follows.
You will need a PORCELIN POT + TREE SAPLING (note this is NOT cutting but sapling). Simply plant the seed in the porcelin pot in the mog house (preferably on dark day since that is the seeds element) and then add 2 crystals of the desired elementak ore color (IE: fire crystals for fire ore and wind crystals for wind ore) on the day of the crystal element. Then harvest on the elemental day of the ore you are going for and you will hopefully have your elemental ore. Btw these ALL sell for over 200K (so much for Leaping Lizzy hunting).
The downside of this method is as folows. You are not guarenteed an ore EVERY time. There IS a chance of getting lesser results (as with al;l gardening). And the biggie is that it takes approximately a REAL LIFE MONTH to grow these so don't do only one. Have a few going at once so that if one pot fails maybe another will succeed.
I have PERSONALLY grown a water/fire/ice/wind/earth ore and have yet to attempt the light/dark/lightning
so this DOES work. I now have 8 million gil from this with 6 mules over the past 3 months so i don't need the secret anymore. Plainly put it WORKS...albeit a little slow and not 100%. DO IT it is your road to riches :).