I am just starting out, but am trying to find out what grits I need and which stones I can mix. I have some uncut Amethyst, Uncut Emerals, Uncut Citrine, and about 2 lbs of Ruby Sapphire. I have been looking at grits as well as trying to find selelrs of grits. Can I mix any of these in the Rough Stage? Do I need Diamond Powder or ?Borine? Do I need to get some pellets still? I have a dual Tumbler.
Ruby and sapphire are both corundum, which is 9 on the Mohs scale of hardness... and that is hard! Few people tumble corundum. I'd suggest you start with quartz first, you'll see better results in much less time. Plenty of suggestions on grit to use and steps to follow can be found on this website if you just look around.
As someone who has tumbled more gemstone than agate to date, I'd also say start with something a little easier than especially the ruby/sapphire, <grin>. Wouldn't want you to get discouraged before you're well and truly hooked...
Of what I've done so far, the best results I've gotten have been citrine and topaz, and I've seen some great results others have had with garnet as well. The emeralds I've done have also come out pretty well, but being opaque and buried in matrix like they are they're not quite as good a result as the topaz and citrine have been. The amethyst I've gotten to date has been full of fractures and I haven't gotten much to brag about from those - maybe ten fairly nice stones out of 80-odd.
My ruby/sapphire tumbling results are just a few threads down on this page - and they've been tumbling off and on for nine months or so. The kind of ruby and sapphire that you get in these 'mine-run' mixes are not facet grade, they are completely opaque and at best are the variety that may star if cabbed rather than turn up clear like a stone you'd facet. Tumbled rather than cabbed, what I'm seeing with mine is that at some angles (especially when wet) you get a bit of 'depth' to the stone, and a bit of shimmer from [what I assume are] the layers of alumina - sort of like what you get from Labradorite or Moonstone, but not as flashy or colorful as Labradorite. I'll do my best one of these days to capture on camera what my eye can see.
The only stones you'd need anything diamond for would be the corundum (ruby/sapphire), and then only for the later stages - the emeralds, citrine and amethyst can be done just fine with regular grits and polishes, and the regular SC coarse and medium grits do a pretty good job for the early stages on the corundum as well. I've got a split experiment running right now, with some of the corundum in a tumbler with diamond paste (powder would have been fine too, just that you usually get more diamond per ml/gm in the paste than in a powder), and some in just regular polish or pre-polish. I am seeing some shine on the flatter areas with the ones that are in regular polish after a month of being in there (compared to a day or two for most other stones in a Lot-O at the polish stage), but it's nothing spectacular and I expect that I'd have to leave them in that polish for another six to nine months before they looked anything like polished stones on every side.
The ones in the diamond run are faring a bit better, have shown quite a bit of improvement in the week or so they've been running. I'll take some more pics in a couple of days. They're in a very small (1.1lb) vibe tumbler, btw - I wouldn't myself have wanted to try this with diamond in a 3lb rotary or 4+lb vibe, because it would get *very* expensive. I don't have any idea what diamond's breakdown rate is as compared to SC (for grit-renewal purposes), but even the initial amount needed would be fairly pricey. I want to say that I paid around $60 incl tax/ship for three 5-ml syringes (one 4k, one 14k, and one 50k mesh), and I'd think it would take most of one syringe to charge a 3lb or up tumbler just one time.
I probably wouldn't have taken on the corundum (or would have given up on it long before now) if I hadn't had other tumblers working on things that give better and faster results. Or if I hadn't had a Chicago Electric whose days I already knew were numbered without upgrading the motor, fan and pulley (I did change out the belt, pretty much a must with any CE as the ones they come with don't last) to put them in. It lasted long enough to get the corundum through coarse and medium, and having them there didn't hinder my progress on anything else, so it wasn't a particular hardship or trying-of-patience to have those taking up a barrel on that particular tumbler for that long. But if you're planning on doing them in one dual rotary, I'd definitely recommend starting with something that will show results a lot faster than corundum will.
great info, thank you. I also have the problem of obtaining highly polished rubies-sapphires; since the time you posted your thread, have you achieve better-faster results using different methods-abrasives?
mr.mohs: I was jus think that super volcano would be such cataclysmic advent on the earth vunerable area would slide into the sea
Aug 26, 2014 20:48:02 GMT -5
nowyo: Probably not, Ed, the faults in CA aren't working that way. SoCal will continue it's slow march to the NW and become an offshore chain of islands in oh, 20 or 30 million years. If/when Yellowstone caldera blows we'll have time to say "oh s$#@.
Aug 26, 2014 22:12:02 GMT -5
mr.mohs: so if that sucker blows... none of us will be around to gloat : see I told you so?
Aug 27, 2014 1:02:50 GMT -5
arago: Hey Jugglerguy, I just followed your directions and am washing my rocks (for the first time ever!)in Dawn. Next comes the Borax...
Aug 27, 2014 20:34:48 GMT -5
arago: Wait, what? Did I just jump into a super volcano blow in Yellowstone and a tectonic drift discussion? [pours another glass of Cabernet...]
Aug 27, 2014 20:37:03 GMT -5
arago: Like I said, newb is trying to wash off the residue from his first tumbler run.
Aug 27, 2014 20:38:28 GMT -5
arago: Back to the discussion.
Aug 27, 2014 20:38:44 GMT -5
Fossilman: amanda1982....Go to Kingsley North.com,they are full of goodies and its a one stop store for all your tumbling and hounding needs...
Aug 28, 2014 8:54:45 GMT -5
catmandewe: The volcano at yellowstone finally blew?
Aug 28, 2014 15:29:49 GMT -5
rockpickerforever: Tony, if it did, I think you'd already know about it... Maybe next week.
Aug 28, 2014 15:47:51 GMT -5
Fossilman: Na',it just farted......That place has been burpin' for years though...I think we are lucky it has...
Aug 28, 2014 17:07:55 GMT -5
Fossilman: Would love to see what's underneath that place!!!!!!
Aug 28, 2014 17:08:34 GMT -5
nowyo: Just bought an 18 inch Highland Park saw tonight. Oh, woe is me. What will be the next fix for this junkie?
Aug 28, 2014 23:26:20 GMT -5
rockpickerforever: Oh, you got it bad, Russ. Do you get the DTs when you don't get out and cut rocks on a regular basis? Not the worst thing in world. I have shown great self restraint, 10" HP trim saw largest I have. It makes for a good excuse, can't saw those big rocks.
Aug 29, 2014 0:44:13 GMT -5
wampidy: Jean, I think you should call it "don't have to lift those big rocks". My 12 is good for me also. The one big rock that I cut in Tony's saw in Quartzsite was way too much for me.(only 54 lbs) I am thinking motorcycle lift and rolling them in.
Aug 29, 2014 11:02:47 GMT -5
rockpickerforever: Jim, you know what they say about good things coming in small packages? I'd like to think I have every bit as good a chance to find winners in the smalls, and not have to deal with the big ones. Lifting heavies not good for old backs.
Aug 29, 2014 11:30:36 GMT -5
Shotgunner: hmmm.... good to know Jim has a 12" saw. Must remember for future discussions.....
Aug 29, 2014 22:30:25 GMT -5
Shotgunner: Ohhh!!! Russ has an 18"!! wooohooo!!
Aug 29, 2014 22:30:43 GMT -5
nowyo: Yeah, I do. Got it home tonight. It was in the cellar of a farmhouse. Had to mostly disassemble it to get it through the door and up the stairs. The things we do for fun. I'll put it back together tomorrow night. Bet it hasn't been used in 30 yrs.
Aug 29, 2014 23:01:19 GMT -5
Rockoonz: It aint a big rock saw till you measure blade size in feet
Aug 30, 2014 0:02:45 GMT -5