Hi Kat, I sent you a PM. Good rock polishing equipment is fairly expensive and agates are very hard stone. I don't know where in NM you are but right now the largest meeting of rockhounds in the world is going on in Quartzite, AZ. Lasts all month, you oughta get down there for a weekend if you can. (Google it) You'd get a year's education in a couple of days. Lots of good used and new lapidary equipment for sale there too. If you're near any rock shops you can get polishing done at some of them. There are also lapidary forums where you can get much info, probably more about your nice agates than on here. I'm sure there are also videos of rick polishing on youtube, too. To just polish the outsides you can use a tumbler, but you will lose any crystalline structure. Tumblers can be relatively cheap, but you will need a bunch of different grits to get the job done. P.S., if you do go on a lapidary or rock forum, don't forget us here, we like seeing your agates and your posts.!