A while back a guy named Richard Pickle in Sweet Home Oregon said he had some buyers of ores
I forget his web site just now. He does some assaying; I think "Rockman" may be his moniker. search for him..
You don't say what mineral or what matrix it is in; or what quantity is available Others here have said there are processors/ smelters out there. You may just have to search & shop your ore & see what they offer. If only a small quantity you may find a market for specimens? If you learn/know how to do your own processing you can save the $ someone else will build into their offer for your ore. Might be time to sell the deposit & go find another, better one? Good Luck