I would appreciate very much if somebody could inform me about in which places may I buy the mentioned minerals. I am not looking for nice specimens, no, my interest is to buy large amounts (up to 10 pounds) of them at a good price for other applications.
I am dubious whether the natural minerals are available in the quantities you mention; they're rather fragile minerals. Is there some reason the common laboratory chemicals can't be used? Is this a Texas Aggie joke?