Just wondering if anyone has tried using sand as a pre-tumble before the first stage of 60/90 grit? If not that rushed to really start my first stage, I'll pre-tumble using sand, or the dust left over from smashing rocks. It seems to work fairly well. Instead of recharging everytime with new 60/90 grit.
No reason it wouldn't work, but it would oly cut soft materials. It needs to be coarse builder's sand. Windblown sand like what you find in deserty areas is rounded to the point it won't cut. it isn't useful for concrete production, eityher and that's why the Saudis have to import building sand. It would be useful, I guess, for cleaning off adherent mud and grainy material and removing crusts of soft minerals like calcite. Add vinegar and you have some real potential there. What kuind of stuff do you tumble and what effect does the sand seem to have? How long do you run that stage?
that's great, I was just thinking that very thing last night! I have a bunch of silica sand, I was thinking about using it in the tumbler prior to the 60/90, or maybe even in the vibe, I was thinking the sand in the vibe would be a great way to get good coverage and have a cushioning effect....however I'm concerned about the sand possibly scratching the material in the 500 and above stages...I'm going to test it on a batch of pet wood I'm not too concerned about...
I know my Grandfather used to use a hard gravel in his tumbler before the 60/90 stage...I still have a small amount of it...I'm not sure what kind of material it is...it's rough, angular, kind of black/grey...
Docharber, The effect is not that great, but it does seem to knock off the sharp edges. I polish anything found mostly agate, and pet wood, or anything else that may look nice polished. Bought some Amethyst, smokey quartz and tiger eye, which are tumbling with sand now. I'll get some pictures to show examples of rough, before and after tumbling in sand for about 45 hours. Normally about 100 hours at 78 rpm in sand. It isn't that often I do a pre-grind with sand, but it seems to help. Mikes, Use the sand only in a pre-grind stage before you start the first 60/90 stage. Never use the sand anywhere else execpt as a pre-grind. The sand is used as a replacement of the 60/90 grit. Re-charge as you go with new sand, if you are happy then you can start the first tumble with 60/90. Plus the sand or rock dust is free. Re-charging everytime with first grind 60/90 grit can get costly. This is just my idea, been doing this for a while and certainly won't hurt your hardest stones.
Post by ASI Industries on Apr 5, 2009 14:33:08 GMT -5
I know my Grandfather used to use a hard gravel in his tumbler before the 60/90 stage...I still have a small amount of it...I'm not sure what kind of material it is...it's rough, angular, kind of black/grey.
I got a 5 ton billet of Quartz-Dolerite in my rear garden just 6 inches below the surface, plus it is everwhere within 15 mile radius. -- I hail from (The Barony of Seabegs) Bonnybridge, Stirlingshire U.K, where aliens sometimes come for a visit!
If it's even muddy sandy stuff will work. You can basically place rough stones in a barrel with just water and the stones will create their own grit and round off some. It happens in nature, why wouldn't it happen in our tumblers? Grab a handful of any type sand and give it a try..see what happens.
Useing sand and water or nothing execpt water with your rough stones will do some degree of rounding. It doesn't matter what you are using as grit, just add a handfull, about 6-8 table spoons, add water to just cover the top of your stones and let it shake, rattle and roll. See what happens after 2-5 days. Most certainly the sand does help, but not as great as the 60/90. Could save some money if your are not in a real hurry to get your stones done. Or a low budget guy, like me, trying something different.
I have tumbled using sand as a "pre-grit" media more than a few times but I use it to clean rocks I collect or rocks that have been sitting outside for a while and have gathered organic mung. I will tumble them for a few hours with 4-5Tbsp of sifted beach sand or bulk quartz sand (available at craft stores or cheaper if you can find it as white sand ashtray filler). It definately starts to take the sharp edges off if you leave it going for a while but it would round off and break down quickly with most stones.
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Just wondering if anyone has tried using sand as a pre-tumble before the first stage of 60/90 grit?
A few old timers used to use sand in place of 60/90 because it was cheap. it takes longer. What makes Silicon carbide a better cutter is that it tends to break into smaller bits but fractures with new sharp/fresh cutting edges as it breaks down.
wampidy: Okay, ya'll can go back to work now.
Jan 20, 2015 8:06:15 GMT -5
wampidy: Hello, HELLO, Is anybody there? Where in the hell is everybody?
Jan 20, 2015 8:09:34 GMT -5
wampidy: Oh crap, I forgot that Q is rockin. Never mind.
Jan 20, 2015 8:11:25 GMT -5
Fossilman: Jim,you all right......LMAO!!!!
Jan 20, 2015 20:58:57 GMT -5
gemologistjohn: I know a bit about this material. I named Jessite and wrote an article on it in 2014, january issue of Lapidary Journal Jewelry Artist Magazine. Very little ever came out after that. Kaily Agate was found in the same vein same mine. both my kids names
Jan 22, 2015 10:01:54 GMT -5
gemologistjohn: Kaily Agate is the correct spelling and name for this material. If I can figure out how to put pix in here I will show both Jessite and Kaily Agates
Jan 22, 2015 10:02:42 GMT -5
Shotgunner: gem'o john, you need to use a remote host for pics. Like your website, flickr or another...
Jan 22, 2015 21:49:31 GMT -5
stonesthrow: I have a couple slabs of the jessite and kaily agate
Jan 22, 2015 23:30:34 GMT -5
stonesthrow: Hi John we spoke via email some months back
Jan 22, 2015 23:31:29 GMT -5
drocknut: Had a blast at the bbq last night in Quartzsite. Great catching up with friends.
Jan 25, 2015 14:13:58 GMT -5
rockpickerforever: Back home after 9 days in Quartzsite, wanted to stay longer! Will be having a contest - guess the mileage - winner gets am MFRB of Brenda Jasper from the field trip. Will get pics and post details tomorrow. Stay tuned!
Jan 26, 2015 0:56:57 GMT -5
roxgrrl: Anyone around from Minnesota/Wisco?
Jan 26, 2015 13:41:41 GMT -5
adam: nope, Kentucky here... some day, though, maybe I'll live out west. location affects everything. sigh.
Jan 26, 2015 15:41:43 GMT -5
Fossilman: We moved from North Dakota to Oregon-I'm in rock heaven here!!!!!!!!! Thumbs up
Jan 27, 2015 12:22:51 GMT -5
europast: Lucky people live in Oregon - the rest of us just wish we did!
Jan 28, 2015 20:45:03 GMT -5
Fossilman: Montana comes so close though....
Jan 28, 2015 22:55:10 GMT -5
wampidy: Wyoming is best of all if you do not mind going back in time 200 efin years.
Jan 29, 2015 7:12:01 GMT -5
nowyo: Hell, Jim, that's the best part.
Jan 29, 2015 14:25:43 GMT -5
Fossilman: LOL,North Dakota was that way too....Some times that is a good thing...
Jan 29, 2015 20:42:56 GMT -5